The Sovereign Lender of Last Resort Role of the ECB: Rules, Choice, and Time

Abstract This article argues that the European Central Bank (ECB), supported by the Court of Justice of the European Union (CJEU), can be perceived to have functionally softened the no sovereign lender of last resort (LOLR) rule originally implied by Articles 123 and 125 of the Treaty on the Functioning of the European Union (TFEU) towards a rule-with-exceptions and, increasingly, towards a presumption: The ECB will act as sovereign LOLR to a constituent Member unless and until that Member is insolvent or unwilling to cooperate with measures designed to restore market confidence. This functional moderation of a rule, from an ex ante specification of an outcome towards the exercise of greater choice at the point of application, carries with it contentious normative questions. To motivate discussion thereof beyond a largely ahistorical, non-indexical, rules versus discretion debate, the rules of the currency union are located within the genealogy of international exchange rate regimes. The “convertibility” rule of the gold standard and the “parity” rule of the Bretton Woods system are contrasted with their Eurozone equivalent. A consequentialist standpoint is sketched out from which the interventions of the ECB, in light of their available alternatives, appear broadly consistent with welfarist cost-benefit analysis and less normatively worrisome than by reference to evaluative criteria that emphasize a narrowly rule-bound conception of the rule of law.

economics. Yet, the euro project was based on a decision by Member States to replace currencyexchange markets with a fixed exchange rate. 1 In the Treaty of Maastricht, those Members committed themselves to a monetary rule (low and stable inflation) and established an institution to guard that rule (the European Central Bank). 2 Unlike traditional central banks, the ECB was not provided with a mandate to act as lender of last resort (LOLR) to the Members of the euro or the Eurozone banking system. In fact, its mandate explicitly prohibited the provision of bailouts or any type of credit facility to the Members. 3 Although not explicit, Article 123 of the Treaty on the Functioning of the European Union (TFEU) has been widely interpreted as prohibiting monetary financing. 4 The minimalist legal architecture of the single currency enshrined a political compromise that resulted from long and detailed negotiations. 5 The original political compromise embedded in Articles 123 and 125 TFEU can be thought of as embodying a deeper rule: The ECB will not act as a sovereign LOLR to the Members. During the global financial crisis, over a quarter of the Members were recipients of bailouts and, arguably, monetary financing of some kind. 6 From a legal perspective, a normatively troubling aspect of the Eurozone crisis is the fact that the turning point came not from a legal enactment. Rather, it came in July 2012 when Mario Draghi, the President of the ECB, delivered his "whatever it takes" speech to the "Global Investment Conference" in London, followed by a press release in September 2012 setting out details of a program called Outright Monetary Transactions (OMT). 7 Subsequently, the Court of Justice of the European Union (CJEU) held, in Gauweiler, the ECB's proposed interventions into sovereign debt markets to purchase the sovereign debt of distressed Members, even in the absence of any ex ante quantitative limit, to be consistent with the prohibition on monetary financing. 8 As pointed out by Hinarejos, this decision was never in doubt given the likely welfare 1 In the words of Hinarejos, "Gauweiler was not a surprising decision, in that very few expected the Court of Justice to declare the Outright Monetary Transactions Programme incompatible with EU law." She goes on to acknowledge the perceived arbitrariness of the Court's decision but locates the origin of that arbitrariness in the separation of competences at the heart of the legal framework. Hinarejos, supra note 8, at 574-75.
Goldman mounts a strong case that PEPP will likely survive any legal challenge before the CJEU on the basis of the Gauweiler and Weiss jurisprudence. 18 Indeed, Dawson and Bobić have observed that the CJEU's "answer to any question related to ECB activity (at least on monetary questions) seems to be known in advance." 19 However, on May 5, 2020, the GFCC delivered a controversial ruling wherein they took issue with the proportionality review conducted by the CJEU. 20 The Bundesbank were instructed to not continue participating in the PSPP unless within three months the ECB adopted a new decision that demonstrated "in a comprehensible and substantiated manner that the monetary policy objectives pursued by the ECB are not disproportionate to the economic and fiscal policy effects resulting from the programme." 21 And so, notwithstanding the extent of the economic shock or the uncertainty surrounding the pandemic, in stark contrast with the Eurozone crisis, Members continue to enjoy the benefits of ultra-low bond yields. 22 Moreover, the legal position is that the ECB's unconventional interventions underpinning those ultra-low yields have so far been found consistent with the Treaty framework as adjudged by the relevant apex court, the CJEU. And PEPP is also likely to be so adjudged. The decision of the GFCC is not binding on the ECB, and, in fact, the GFCC court expressly stated the case did not concern PEPP. 23 Therefore, beyond parsing the constraints imposed upon the ECB by the CJEU, this might prompt the comforting conclusion that we have little use for further analytical or normative investigation into how the legal structure of the ECB has come to be both complimented and disciplined by the functions demanded of it through its lived experience. Put another way, we need not dwell on the extent to which (legal) form has, or has not, followed function.
Not so fast. The protest by the GFCC that their decision in Weiss does not concern PEPP rings hollow. 24 The GFCC explicitly list a set of conditions that they say mainly render PSPP a manifest circumvention of the prohibition on monetary financing. 25 In doing so, the GFCC imply that those conditions are necessary for the program to comply with EU law. PEPP does not contain those conditions. It strains credulity to believe that the court was not well aware of this fact. Therefore, the decision of the GFCC portends further significant conflict over the role of the ECB in minimizing and distributing the burden of economic adjustment arising from the pandemic as it functions as a sovereign LOLR to the Members. That conflict primarily manifests in the on-going struggle for interpretive control over the so-called prohibition on monetary financing as it embodies the principal legal constraint on the ability of the ECB to act as sovereign LOLR to the Members. 18 This is so even if the ECB makes asymmetric purchases of sovereign debt of Members not subject to a program of structural adjustment overseen by the ESM. Matthias Goldmann, Borrowing Time: The 21 Id. at para. 235. 22 Tommy Stubbington, Eurozone Governments Rein in Borrowing Despite Ultra-Low Rates, FINANCIAL TIMES (Jan. 8, 2020) https://www.ft.com/content/5bf34690-3239-11ea-9703-eea0cae3f0de. 23 The ECB did not appear before the GFCC, perhaps, because it might prompt the misimpression that the ECB falls under the jurisdiction of Member courts. For a description of the atmosphere at the hearing, see Franz C. Mayer, To Boldly Go Where No Court Has Gone Before: The German Federal Constitutional Court's Ultra Vires Decision of May 5, 2020, 21 GERMAN L.J. 1116, 1120 (2020). 24 Isabel Schnabel, Member of the Executive Board of the ECB, observed that despite Germany experiencing one of the longest economic upswings since the Second World War and the lowest level of unemployment since German reunification, public debate about ECB monetary policy is becoming more heated within Germany, with conversations referring to expropriation of German savers through punishment rates and claims of massive looming inflation and zombie firms. Isabel Schnabel, Narratives About the ECB's Monetary Policy -Reality or Fiction?, Speech at Karlsruhe (Feb. 11, 2020), https:// www.ecb.europa.eu/press/key/date/2020/html/ecb.sp200211_1%7Eb439a2f4a0.en.html. 25 Weiss at para. 216. Furthermore, Bobić and Dawson, who are also strongly supportive of the PEPP, get it exactly right when they argue that "the PEPP programme signals both the increasing redundancy of the legal framework governing EMU and an opportunity to develop a new one in its place." 26 Without in any way directly or implicitly undermining the pragmatic approach of the CJEU, in light of the growing gap between the formal and functional constitutional framework of the ECB, there are reasons prompting a more substantive, or thicker, analytical account of the evolution of the ECB's sovereign LOLR function: one that better works the ground between the judicial and sovereign bondholder interpretations of the rules.
The first reason for thickening our account is to develop theoretical frameworks that might usefully contribute to our understanding of, and predictions for, the ECB's functional constitutional framework at a time when unconventional measures have become the new normal. It is worth recalling that the intellectual response to the Great Depression birthed the field of macroeconomics as we know it. 27 In the wake of the global financial crisis, macroeconomists are "rethinking macroeconomic policy" in general and Dynamic Stochastic General Equilibrium Modelling (DSGE) in particular. 28 On the legal front, Yair Listokin is breaking a path towards a theoretical framework for law and macroeconomics. 29 He does so by combining New Keynesian models with legal theory. 30 As we will see in section 5, the analysis that follows finds itself in deep sympathy with Listokin's framework and consequentialist analysis. 31 A further impetus for thickening our account is bound up with the fact that, from a governance perspective, the LOLR function of the ECB places the regime on the horns of a dilemma. 32 There is a long-established consensus within and between the Members that low and stable inflation is a mutually beneficial outcome for all. This consensus is the cornerstone of central bank 26 Feichtner also offers a constructive reading of the judgment to the effect that it offers impetus for the democratization of money. See Isabel Feichtner, The German Constitutional Court's PSPP Judgment: Impediment and Impetus for the Democratisation of Europe, 21 GERMAN L.J. 1090 (2020). See also Ana Bobic & Mark Dawson, COVID-19 and the European Central Bank, VERFASSUNGSBLOG (Mar. 27, 2020), https://verfassungsblog.de/covid-19-and-the-europeancentral-bank-the-legal-foundations-of-emu-as-the-next-victim/. 27 Robert Lucas, Macroeconomic Priorities, 93 AM. ECON. REV. 14, 1 (2003). 28 This is the title of three conferences held by the IMF. See also Olivier Blanchard, Ten Take Aways from the "Rethinking Macro Policy: Progress or Confusion?", INTERNAIONAL MONETARY FUND BLOG (May 1, 2015), https://blog-imfdirect.imf.org/ 2015/05/01/ten-take-aways-from-the-rethinking-macro-policy-progress-or-confusion/; Olivier Blanchard, Do DSGE Models Have a Future? (Peterson Inst. Int'l Econ., Pol'y Brief 16-11, 2016), https://www.piie.com/publications/policy-briefs/dodsge-models-have-future.  30 Specifically, he uses the investment-savings and liquidity-money (IS/LM) model, which is less wieldy than dynamic stochastic general equilibrium modeling. Id. 31 To borrow the definition offered by Walter Sinnott-Armstrong, consequentialism "embodies the basic intuition that what is best or right is whatever makes the world best in the future, because we cannot change the past, so worrying about the past is no more useful than crying over spilled milk." In terms of a legal formulation of this moral stance, Pildes and Sunstein put matters succinctly when they say that "[i]t is hard to challenge the view that law and policy should be assessed on the basis of inquiries into the advantages and disadvantages of different courses of action." W. Sinnott-Armstrong, Consequentialism, independence. 33 Conversely, no consensus exists regarding the distributional choices implied by the financial support provided to Members and their banking systems or the economic reforms that are a condition thereof. Leaving aside disagreement over the extent to which its newfound role is legitimated by the CJEU (and impugned by the GFCC), and whether it has the capacity to select the "right" policy response (assuming one to exist), the governance structure of the ECB was not designed to house contested disputes over distributional choices. 34 Nevertheless, during and since the Eurozone crisis, such choices were made, at least in part, by unelected EU officials (i.e., those of the ECB) and reviewed by other unelected EU officials (i.e., the members of the CJEU). As a result, even assuming the utmost probity and technical competence, 35 the balance of influence within the Eurozone between the Members, the institutions, and the Members and the institutions is being profoundly reshaped, and this balance of influence has been explicitly challenged by the GFCC. 36 The GFCC, in Gauweiler and Weiss, can be seen to have raised concerns about the transparency of the cost-benefit analysis informing the ECB's choices. This concern is bound up with the democratic accountability and legitimacy of that institution. The governance issues implied by the ECB's sovereign LOLR function also give rise to deep uncertainty about the choices that it will have to make if the economic crisis implied by the pandemic deepens significantly. Although limited progress has been made towards a banking union with risk sharing, 37 the "doom-loop" link between the Members and their banking systems has not been severed. 38 It remains unclear how, and the extent to which, the ECB will support a Member in the throes of a financial crisis if that Member has not agreed to a structural reform package pursuant to the ESM Treaty. 39 Indeed, the high levels of unemployment in the periphery Members, the rise in support for populist parties, the high levels of reported distrust of EU institutions, and stubbornly low growth all undermine the assumption that a Member can agree to a structural reform package. 40  To date, much of the legal scholarship on the euro crisis has focused on the constitutional changes within a continuum of EU law and institutions. 42 Comparatively little attention has been paid to the creation of the euro in the context of international monetary governance regimes. This is understandable as there are no convincing historical analogies for the legal architecture of the Eurozone; a sui generis experiment, as noted at the outset. 43 Anachronistic reasoning is dangerous, yet the under-studying of the lived experience of rules underpinning historical international monetary cooperation regimes may have led to unrealistic expectations regarding the operation of monetary rules, albeit of different sources, in the face of adjustment. This article fills that gap and provides a novel historical analysis of the ECB's interventions from a consequentialist rule of law perspective by placing two distinct literatures in conversation. First, it provides a framework for the purposes of elucidating the role of law as a commitment technology used to bind future choice. Second, that analysis is enriched by way of a detailed historical account of the role of law in the gold standard and Bretton Woods systems.
In light of the foregoing analysis, this article goes on to provide an alternative perspective on Draghi's sagacious "whatever it takes" speech to that of the CJEU. To recall, the CJEU implied that the actions of the ECB never breached the sum and substance of the prohibition on monetary financing. This article argues that the interventions of the ECB represent a functional softening of the no sovereign LOLR rule originally implied by the treaty towards a rule-with-exceptions. The ECB did so in adherence to a rule of greater import: to secure the survival of the euro or at least avoid the welfare effects flowing from its abrupt collapse. Further, or in the alternative, the ECB did so to secure the survival of the legal order within which the rule was embedded.
Considered in this light, the no sovereign LOLR rule was softened towards a rule-with-exceptions, so the argument goes, as rule departure was necessitated by the economic circumstances of economically distressed Members and the commitment of those Members to enter into a credible program of macroeconomic adjustment to restore market confidence. However, a rule-withexceptions implies a potentially paralyzing choice at the point of application. As politically challenging as it is to articulate the conditions for rule departure ex ante, it is better to do so rather than engage that choice at the point of application. This can be done by the creation of presumptions that retain a measure of choice at the point of application but limit the paralyzing effect of choice. As we will see, the conditions associated with OMT have softened for PSPP and softened again for PEPP. Therefore, notwithstanding the objections of the GFCC, these conditions can be viewed as sufficient, but not necessary. 44 In this context, the interventions of the GFCC can be interpreted as a call for greater clarity regarding the conditions for rule departure and for greater transparency regarding the decision to depart from the rule. This is a helpful step towards building a presumption. The presumption being: the ECB will act as sovereign LOLR to a Member of the Eurozone unless that Member is insolvent or unwilling to cooperate with measures designed to restore market confidence. Maduro argues that the GFCC assumed that the conditions in Gauweiler were necessary to safeguard the objective of sound fiscal and budgetary policies. He points out that a close reading of the CJEU decision fails to support that assumption. Miguel Poiares Maduro, Some Preliminary Remarks on the PSPP Decision of the German Constitutional Court pt. 3, VERFASSUNBLOG (May 6, 2020), https://verfassungsblog.de/some-preliminary-remarks-on-the-pspp-decision-of-thegerman-constitutional-court/.
In effect, the moderation of the rule operated like a safety valve releasing some of the pressure associated with internal devaluation or abrupt sovereign default as implied by strict adherence to the text of the treaty instruments. When placed into context alongside previous exchange rate regimes, this development represents less by way of historical anomaly than when viewed against the backdrop of EU law. Moreover, when this development is considered not as a choice between rules and discretion-where both appear unacceptable for economic or rule of law reasons, respectively-but is instead understood in light of a more refined understanding of the relationship between rules, choice, and time, the battle to create a sustainable single currency that promotes prosperity and satisfies the requirements of democratic legitimacy looks a little more winnable.
The balance of this article proceeds as follows. Section B analyzes a stream of, primarily though not exclusively, individual and collective work by Edna Ullmann-Margalit and Cass Sunstein on the relationship between rules, choice, and time. In particular, it examines second-order decisions and the use of law as a commitment technology. It considers the role of choice in the ex ante specification of outcomes. The insights from this section underpin the analysis of Section E. Section C reviews the role of the legal instruments in the gold standard and the Bretton Woods systems. It considers not only the rules, but also their consequences. Section D centers on the rules of the EMU. In particular, it examines the no sovereign LOLR rule that was-in theory-supported by the Stability and Growth Pact (SGP). Section E is the core of the paper. In light of the context in which the ECB's interventions took place, it argues that its effect can be understood as a softening of the no sovereign LOLR rule towards a rule-with-exceptions with the potential to become a presumption. Section F concludes by sketching out some insights for the reform projects that tackle the governance issues facing the ECB.

B. Law as a Commitment Technology
Central banks make decisions that can have good and bad consequences. Their ability to make decisions is deliberately circumscribed by rules. Rules constrain future choice in an effort to bring about consequences that are, in aggregate, better than exercising choice at the point of application. In this section we consider the relationship between choice, rules, and time at a general level so that we can consider the possibilities and limits of the specific rules underpinning international monetary regimes.
Rules matter for the transmission of monetary policy. 45 The debate over whether fixed rules can, in general, deliver superior monetary policy dates back as far as the "Currency School" versus "Banking School" debate on the Bank Charter Act of 1844. 46 In the contemporary transmission of monetary policy, rules are an important tool used by a monetary authority, usually a central bank, in an effort to achieve a target inflation rate. 47 Central banks endeavor to credibly signal a commitment to their rules so as to assist the public in adjusting its inflationary expectations. 48 Although the debate surrounding rules versus discretion in inflation targeting is in certain ways unavoidably related to exchange rate policy, it does not form the primary focus of this article. 49 The primary focus of this article is the role of legal instruments underpinning international exchange rate regimes within the context of EMU.
The euro, like the gold standard, can be thought of as a novel experiment in fixed-exchange rates with open capital markets implying that monetary policy is consistent throughout the constituent states. The euro, the gold standard, and the Bretton Woods system were exchange rate regimes guaranteed by differing legal instruments. As we shall see, a significant measure of the discussions surrounding the ECB's interventions, and in fact law more generally, are framed, imperfectly, in dichotomous terms as a choice between "rules versus discretion." 50 This dichotomy carries with it much normative baggage and empirical questions tend to loom large. Therefore, it is worth taking some time to consider the relationship between rules, choice, and time more closely in an effort to dissolve conceptual confusion about the restraint of future choice. In particular, we consider the exercise of interpretative choice over legal instruments that function as commitment technologies. The analysis that follows draws in significant part from Sunstein's response to a "pervasive social phenomenon: extravagant enthusiasm for rules and an extravagantly rule-bound conception of the rule of law." 51 For the avoidance of doubt, the purpose of this article is not to convince the reader of the merits of consequentialist approaches to the rule-of-law. Rather it is to contribute to the ongoing discussion by offering a vantage point that evaluates legal developments on the basis of welfare consequences, as opposed to deontological constraints such as the ethical necessity for rule adherence or an assumption that equates rule adherence with democratic accountability. 52 Although there is an intrinsic value to exercising choice, 53 there are situations when actors do not want to exercise choice. 54 This can be a strategic reaction to the bounded nature of our rationality, our bounded willpower, or simply reflect the limitations of our computational capacity. 55 Rather than a limitation of liberty, choosing not to choose, in certain circumstances, is a welfare promoting behavior. 56 In fact, forcing an actor to make a choice, whether or not she wants to choose, can diminish her welfare. 57 Further, when an actor has chosen not to choose, failure to respect that choice might be paternalistic. 58 This extends beyond individual actors to institutions, political or otherwise. 59 Moreover, the preference not to choose applies to decisions of major and minor consequence; from dinner plans to the distribution of constitutional influence. Actors, therefore, develop strategies to limit choice.
The literature on second-order decision-making concerns itself with the study of the strategies actors develop to avoid decision-making in the first place or, in the alternative, to reduce the costs associated therewith. 60 In the words of Ullman-Margalit and Sunstein, second-order decisions are "strategies chosen before situations of first-order decision in order to eliminate the need for ordinary choice or to reduce the calculative demands of choice.  These strategies impose different burdens on both the actor and on others. They are generally developed in advance of the process of ultimate decision-making but can be developed during that process also. 62 Although the burden of decision-making at the point of application might be reduced through the adoption of a second-order strategy, the construction of a premeditated strategy might itself prove overly burdensome. Furthermore, if an actor selects an inappropriate strategy, that strategy might result in, in aggregate, outcomes that do not justify the savings associated with not having to make the decision at the point of application. Similarly, the strategy might result in decisions that are, in aggregate, insufficiently better than decision-making at the point of application as to not justify the savings involved. 63 One second-order strategy is to craft rules to bind future choice. Sunstein suggests that law has a toolbox. 64 We can plot some of these tools along a continuum. 65 At one pole, there are decisions made, or nearly made, ex ante the point of application. That is to say, at this pole we find the full ex ante specification of an outcome of a decision prior to the event taking place. Jon Elster uses the metaphor of self-binding, in the sense that, "To bind oneself is to carry out a certain decision at time t 1 in order to increase the probability of another decision being carried out at time t 2 ." 66 At the other pole, we are concerned with what Sunstein calls "rulelessness." 67 Rulelessness is a form of decision-making whereby the choice is made at the point of application by the actor. Sunstein, Kaplow, Ullman-Margalit, and others contrast rules with "standards." 68 Kaplow's distinction between rules and standards is only "the extent to which efforts to give content to the law are undertaken before or after individuals act." 69 Writing with UllmanMargalit, Sunstein observes that the consequence of a standard is that it settles far less in advance relative to a rule and does not allow for mechanical on-the-spot judgments. 70 Instead, standards structure first-order decisions.
Second-order strategies are often stylized in terms of "rules versus discretion." However, as we shall see, this dichotomy can cause conceptual confusion. Although a pure account of both extremes might be describable in theory, the realm of praxis is a mix of both. That is to say, just as a rule cannot interpret itself, neither are decisions made without reference to some normative framework. 71 In between these extremes we have, inter alia, ruleswithexceptions and presumptions. 72 When states use a second-order strategy whereby they enshrine rules in law to signal their future commitment to an outcome, the type of legal instrument into which the rules are embedded affects the level of credibility with which the commitment is greeted by its audience. Put 62 Id.

66
Ester imposed a number of conditions. Jon Elster, Ulysses and the Sirens: A Theory of Imperfect Rationality 16 SOC. SCI. INFO. 469, 470 (1977).  For a defense of the thesis that meaning is made, in the sense that it is settled by an account of interpretation that it does not itself contain, and not found, see Sunstein, There Is Nothing that Interpretation Just Is, supra note 31. It is worth emphasizing, however, that this does mean that meaning is entirely up-for-grabs. differently, legal instruments can function as a "commitment technology" or, to develop Elster's metaphor, as a binding agent. 73 The second-order strategy of committing to rules functions as an "enabling constraint." 74 This is particularly so when an actor is tasked with making contentious decisions. For example, rules insulate central banks from popular or political influence so that, at least in theory, they can take unpopular but necessary decisions about the money supply. 75 As one moves along the continuum, decision-making at the point of application raises normative concerns regarding democratic legitimacy and accountability. Unfettered discretion at the point of application can lead to abuse of power, a lack of consistency and predictability, a diminishment of shared future expectations, high costs associated with making decisions, 76 a failure of political accountability, arbitrariness, and an associated sense of unfairness among its audience, including, but not only, the subject of the discretion. 77 Any assumption that these concerns are remedied through movement towards the other extreme of no discretion is misplaced. Adherence to ex ante rules, when a measure of flexibility is required, can produce decisions that are not only unfair but so ill-suited to the circumstances that they degrade the function of the decision-maker and the legal order more generally. 78 This can also raise normative democratic concerns. Ex ante rules can fail to anticipate changes in technology or social norms. Similarly, at the point of design, the drafters may enjoy inadequate information about the context in which the rule will govern. Finally, actors can use legal instruments to give expression to political compromises without addressing pragmatic concerns about the future operation of the rule. From a regulatory perspective, if the enforcement of a rule is not deemed credible by audience actors, the rule might exist in statute but enjoy sparse compliance. This implies that the rules that exist in the text of a legal instrument and the rules that guide the behavior of actors should be distinguished and not conflated. 79 Particular difficulties arise with irrebuttable, inflexible ex ante rules, embedded within a legal instrument, that meet a real world need for flexibility. To take an example: Assume that there is an explicit, numerically defined speed limit (say, 50 kilometers per hour) leaving no discretion to an actor or rule enforcer (versus, for example, a standard that says, "Do not drive dangerously"). 80 A driver is observed breaching that speed limit by a police officer (say, 80 kilometers per hour). The breach is observed in circumstances that require flexibility (say, an unambiguous emergency). The driver is stopped, ticketed, and summonsed to attend Court. Before turning to the abstract, it is worth pausing to note that, in the real world, if that matter found itself before a Court, the perplexed Judge would likely not be asking herself, "What should I do?" Rather, the Judge would ask herself, "Why would a police officer stop the driver, let alone prosecute her, in such a 73 Elster, supra note 66. 74 Sunstein & Ullmann-Margalit, supra note 54, at 13. 75 The ECB is not under the jurisdiction of the GFCC, nor is it bound by its judgment in Weiss. Hence why the threat by the GFCC to prohibit German authorities, including the Bundesbank, from complying with PSPP is so confrontational. 76 For example, the costs associated with identifying, gathering, and assimilating the information necessary to make a decision at the point of application. 77 Sunstein, supra note 64, at 958. 78 See Kaplow, supra note 67.  80 The example of speed limits is common for Sunstein, Ullman-Margalit, & Kaplow. See, e.g., Sunstein, supra note 64, at 959; ULLMAN-MARGALIT, supra 59, at 45; Kaplow, supra note 67, at 560. circumstance?" This implies that, in practice, actors and rule enforcers enjoy discretion: adhere to/ enforce the rule or not. In fact, the decision of an actor to adhere to, or rule enforcer to enforce, a clear ex ante rule might itself be normatively troublesome. 81 In an effort to formalize this understanding of the real-word implications of administrative discretion, Sunstein and Ullman-Margalit suggest that the police officer would "soften" or "moderate" the rule towards a presumption. 82 The promise of such a moderation is that actors continue to enjoy the benefits that flow from having an ex ante rule: Rule clarity is increased relative to a standard, and behavior can be organized around the rule, yet potential for manifestly bad outcomes arising from excessive rule adherence is diminished. In this way, the presumption functions as a default rule for the decision-maker. A presumption is particularly useful when the circumstances necessitating departure from the rule, i.e., rebutting the rule, are unknown at the time of rule-making. When the circumstances requiring exception are known and specified ex ante, we have a "rule-with-exceptions." 83 The distinction between a "presumption" and a "rulewithexceptions" is subtle but worth making; it relates to decisions made under conditions of uncertainty. 84 When an actor knows that a particular circumstance exists or does not exist, the distinction between a presumption and rule-with-exceptions is immaterial. The actor will end up with the same result through the application of either. In their words, Ullman-Margalit and Sunstein formalize a "rule-with-exceptions" as: Do X-except in circumstances A, in which case do non-X (or, in which case you may be exempt from doing X).
By contrast, when an actor does not know whether a given circumstance exists, the distinction between a presumption and rule-with-exceptions becomes important. With a presumption, the actor is not justified in departing from the rule until the rule has been rebutted. Therefore, rule adherence should continue until the rule has been rebutted. Again, in their words, a "presumption" tends to be formulated as: Act on the assumption P-unless and until circumstances A (are shown to) obtain, in which case, stop (or reconsider or do something else).
And, so, with a rule-with-exceptions, the actor is not justified in departing from the rule unless the exception (particular circumstances) exists. If the actor is unsure whether the circumstances allowing departure from the rule exist, she still has to make a decision about whether she is justified in following the rule or justified in following the exception, and until she does so, that decision-making process paralyzes her. That is to say, under conditions of uncertainty, in the case of a presumption, the actor continues with rule adherence until the conditions for departure are satisfied. In the case of a rule-with-exceptions, the actor must make a choice and decide whether to adhere to or depart from the rule, and she is immobilized from doing either until the decision has been taken, yet may or may not be not be (at least fully) justified by the rule in doing either.
The obvious objection to the softening of a rule to a presumption is that it is not normatively or democratically justified. The integrity of the legal order, so the argument goes, requires rule adherence. Yet, returning to the example of the police officer softening the ex ante numerically defined speed limit rule, Sunstein defends the exercise of such a discretion as democratically legitimate and 81 For an extreme articulation of the "banality of evil" associated with mindless rule-adherence, see normatively justified on the grounds that the discretion at the point of application promotes the cause of liberty. 85 That is to say, there are sound democratic grounds for the actor and enforcer "interpreting" the rule as, in fact, a presumption that has been rebutted on consequentialist grounds. 86 Doing so brings about a better outcome than any alternative courses of action. Therefore, the cost-benefit welfarist analysis underpinning this framework animates Sunstein's defense of a form of casuistry with a spirit of consequentialism. 87 States aim to design second-order decision-making strategies that appropriately commit that State to the ex ante narrowing of future choice. Yet, they resist the temptation to try to, in uncomplicated ways, lay down decisions in advance of the unfolding of circumstances. 88 A second-order strategy, determining whether to adopt an ex ante rule or to defer decision-making to the point of application, trades decision and error costs across contexts. 89 The likelihood of an error at the point of application will depend, in significant part, upon an assessment of the competence of a decision-maker entrusted to make the future choice. A decision-maker with the capacity to conduct an efficient, pragmatic, contextualized inquiry into the relative costs and benefits of the prospective choice will likely minimize error. Such a capacity promotes the delegation of choice. Moreover, the capacity to do so affects the normative justification for decision-making at the point of application. 90 By contrast, limited competence might, in aggregate, result in greater errors than the straightforward application of an ex ante rule.
Finally, where a decision is made ex ante and a rule is embedded in a legal instrument, the compliance mechanism associated with that commitment, or absence thereof, will affect the credibility of the commitment of the state to that rule. 91 Often, a state will bind itself with a legal instrument in the knowledge that a court will hold it accountable for any breach of that commitment. Audiences can place trust in that commitment assuming that a court can appropriately monitor and sanction non-compliance. In reality, in an inter-state context, compliance with international law instruments, in the absence of credible mechanisms of enforcement, is typically met with less credibility. 92 As we shall see, states have experimented with international legal regimes and 85 Sunstein, supra note 64, at 1024. 86 For the avoidance of doubt, it is not being suggested that decision-makers enjoy unfettered discretion to elect what rules to enforce and in what circumstances they can do so. For a discussion of the constraints, see id.

87
For state-of-the-art evaluation of consequentialism, welfarism, and costs-benefit analysis and their relationships to both ethical and legal analysis, see ADLER, supra note 52, at 20-38. 88 Normative and empirical approaches to choice architecture are considered in the rapidly expanding field of behavioral public economics. See generally Sunstein & Thaler, supra note 56; Douglas, Bernheim, & Taubinsky, Behavioral Public Economics (Nat'l Bureau of Econ. Rsch., Working Paper No. 24828, 2018), https://www.nber.org/system/files/working_ papers/w24828/w24828.pdf (last visited Sept. 21, 2020). 89 Posner & Vermeule, supra note 50. A key deficiency in the international human rights regime is the lack of any-or any meaningful-monitoring and enforcement mechanism identifying and sanctioning non-compliance. Instead, Posner contrasts the absence of effective monitoring and compliance mechanisms in human rights treaties with the sanctioning capacity of the WTO. Posner suggests focusing on trade and investment in an effort to improve the welfare of the marginalized. Richard Rorty offers a defense of human rights discourse more generally to the effect that through conversations, and literature, about human rights we institution building in an effort to promote the credibility of their commitments. They also do so to incentivize the compliance of other states with their commitments, thereby diminishing the likelihood of "cheating" or "free-riding," and in an effort to promote democratic accountability.
The Members of the Eurozone took a second-order decision to pool their sovereignty and bind themselves to rules functionally monitored and enforced, in significant part, by an institution, the ECB. Before turning to consider the operation of that regime, both in theory and effect, we turn first to consider two predecessors thereto. In this way, we consider the euro project against the backdrop of international exchange rate agreements.
We do so because the normative and institutional issues bound up with the European integration project have causes and effects that are interwoven. The debate about EMU serves as a metaphor for the future of the EU as a polity, the social model, and the nature of European identity. 93 Yet, the Eurozone crisis has cast doubt on the viability of a mechanism of integration such as one envisioned by the EMU. 94 This has made analysis of the legal rules governing monetary policy extremely contentious because, as Hinarejos puts it, these disagreements about monetary integration are really "disagreements about our understanding of political legitimacy, democracy, and the bond between Union, states and, citizens." 95 As we shall see, the single currency was a project built on words that are failing to sustain the heavy burden that they were required to carry. But we should not desire, let alone expect, what is not possible. And so, rather than wade directly into these deep and treacherous waters, we consider, and then bear in mind, the extent to which it was ever realistic to expect the rules at issue to sustain the burden that they were asked to carry. In this way, we might move beyond the blame game towards pareto improving interventions.
Accordingly, in the next section, we turn to examine the second-order decision by states to adhere to a "convertibility rule," thereby committing themselves to the gold standard regime. We turn then to focus on the strengths and weaknesses of its successor, the "parity rule," along with the institutional infrastructure erected to support it. The gold standard was a product of technological innovation. 96 Prior to the industrial revolution, gold was impractical as a day-to-day currency, as the smallest gold coin was still too valuable to be useful in ordinary commercial exchange. Most states used silver or some form of bimetallic standard to create money. It was the harnessing of steam power by mints that allowed states to sufficiently standardize notes and coins to such a degree that counterfeiting became difficult. This technological development facilitated the rise of standardized tokens redeemable for gold and, by extension, the gold standard. In the late 1800s and early 1900s most states adhered to a gold standard such that they guaranteed to redeem their currency for gold, a "convertibility rule." In its purest expression, the gold standard implied that each country would provide a definition of the price of a specified weight of gold, a coin, in its own currency and then keep that definition fixed over time. 97 For example, if a United States dollar could be redeemed for one twentieth of an ounce of gold from the U.S. Treasury and a British pound could be redeemable for an ounce of gold, at least in theory, the exchange rate between the British pound and U.S. dollar was fixed, albeit in the absence of any international law instrument. 98 The purpose of the gold standard was to ensure aggregate price stability through governments self-binding their ability to engage in monetary expansion and, by extension, inflation. 99 From a legal perspective, perhaps the most interesting aspect of the gold standard is what it was not: There was no formal agreement between its constituent states. Although policymakers recognized the advantages of a gold convertibility rule from as early as 1867, its gradual adoption emerged in a decentralized fashion as its benefits became apparent. 100 The convertibility rule within the state functioned as a commitment technology. 101 The implicit self-enforcing mechanism was dependent upon domestic legislative commitments and the credibility of those commitments in the eyes of market actors. In the event that a state expanded its money supply, currency holders could immediately redeem that currency for gold. This arbitrage opportunity incentivized actors to act as an equilibrating force within the system. 102 The level of perceived commitment of a state to its convertibility rule was key to the smooth operation of the system. However, Bordo and Kydland are keen to point out that, contrary to popular opinion, a measure of discretion was always embedded within the public understanding of the convertibility rule. 103 That is to say, the commitment of a state to its convertibility rule was not absolute. According to Bordo and Schenk, the rule was contingent. 104 The rule could be rebutted and replaced by fiat currency in times of war or where a lender of last resort function was required. 105 Although the system was straightforward and transparent in theory, in practice the operation of the gold standard was uneven. The period prior to the First World War was a prosperous era of global trade. 106 In fact, the gold standard boosted trade more than the euro ever did. 107 This led to the deification of the gold standard in sections of popular culture. 108 However, the fact that the 97 Michael Bordo & Finn Kydland, The Gold Standard as a Rule (Nat'l Bureau of Econ. Rsch., Working Paper No. 3367, 6, 1990), http://www.nber.org/papers/w3367.pdf (last visited Sept. 21, 2020). In reality, in the nineteenth century there was a mixed standard containing both fiduciary money and gold coins. 98 Posner & Sykes, supra note 1, at 1050. In economic parlance, this mechanism functioned to limit the pursuit of time-inconsistent discretionary policies by states. This term describes the fact that policies deemed optimal at one point in time may not be deemed optimal at a future point in time and therefore not implemented. See Michael Bordo & Catherine Schenk, Monetary Policy Cooperation and Coordination: An Historical Perspective on the Importance of Rules (Hoover Inst. Econ., Working Paper Series 1, 4, 2016). 102 Although, in practice, gold prices were not fully equalized. This is because there was a cost associated with arbitrage. See O'Rourke & Taylor, supra note 1, at 170. 103 Bordo & Kydland, supra note 97. 104 Id. at 4. 105 Id.

106
According to Bordo, true price stability was not achieved during the classical gold standard era due to shifts in the relative supply and demand for gold. In particular, cryptocurrencies are intertwined with the idea of an inflation free money that government cannot appropriate without the consent of the owner. In investigating the link between cryptocurrencies and the gold standard, see Michael Bordo & Andrew Levin, Central Bank Digital Currency and the Future of Monetary Policy, (Nat'l Bureau of Econ. Rsch., system worked fairly smoothly in the core states, namely Germany, the UK, and France, during the pre-war period is intertwined with the specific economic and political circumstances of that period. 109 Importantly, only limited adjustment was required by the core states during that time, and, when adjustment was required, it could be achieved in ways that allowed countries to avoid policies of internal devaluation. 110 Eichengreen argues that the success of the system during this period was not primarily attributable to the management of the anchor currency (sterling) by the Bank of England. 111 He argues instead that the system was, in fact, multipolar and supported by ad hoc cooperation between various states. It was the perceived commitment by the monetary authorities in the core countries to the gold convertibility rule, regardless of the consequences, that lay the groundwork for its success.
The operation of the gold standard following the First World War was significantly less smooth. Accordingly, it can be useful to divide the gold era into a functioning pre-World War One period (the "classical gold standard") and a dysfunctional inter-war period (the "gold exchange standard"). 112 This conceptual division raises the prospect that the failure of the gold exchange standard might be attributable to factors other than the principle underlying the rule.
Without doubt, the political climate and economic circumstances were profoundly changed by the Great War. 113 Leaving aside the dispute within countries such as Germany and France over how the burden of adjustment would be distributed, the extension of suffrage and labor protection laws recalibrated influence within the core countries. The spirit of cooperation that existed between the states prior to the War was replaced by divide over reparations and war debts. 114 At a more technical level, the parities were set at unsustainable levels. This, in turn, was reinforced by a reluctance to re-align those rates lest it diminish the credibility of the commitment to the rule in the eyes of the market. At the same time, the perceived political and economic costs associated with a state pursuing policies associated with internal devaluation were better understood. This diminished the perceived likelihood of a state actually pursuing them. 115 In sum, the credibility of commitment of the core states to the gold standard was significantly weaker than during the classical gold standard era. This insight is key in the context of the euro crisis and the commitment the Members to internal devaluation: The gold exchange standard lacked the credible commitment of the pre-war system because it was obvious to market actors following the lived experience of the system that states could no longer be counted upon to subsume internal stability to external goals. 116 Similarly, the pre-war levels of cooperation were shot.
Seven observations are noteworthy: four to do with the rule, two with cooperation, and one with the framing effect of gold. First, the fundamental difficulty with the convertibility rule was the ex ante nature of the decisions it made about the money supply. It circumscribed the ability of a state to adjust its money supply as its economy grew. States became unable to smoothly adapt their money supply to changing internal or external economic developments. Instead, the inelasticity of the supply of gold tied the supply of currency to the happenstance of gold discovery. 117 Second, but relatedly, also as a by-product of the inelasticity of gold, states were constrained in their ability to pursue counter-cyclical monetary policies in times of crisis. This promoted internal adjustment rather than external devaluation. 118 A monetary authority would have to depart from the convertibility rule in the execution of its LOLR duties. 119 Indeed, Eichengreen attributes a significant portion of the failure of the Federal Reserve to act as an effective LOLR during the American banking crisis of 1931 to a misplaced sense of constraint imposed by the gold standard. 120 Again, the calamitous consequences of the gold standard for the Great Depression are well known. 121 Third, given that the convertibility rule was domestic in origin, the system also lacked a formal, credible threat to "punish" a state that nevertheless unilaterally devalued its currency. 122 As one state devalued its currency in an effort to stimulate exports and reduce imports, others followed suit, creating a destabilizing domino effect. 123 Fourth, Bordo and Kydland argue against viewing the coverability rule as a consistent, irrebuttable rule. 124 Instead, even in its strongest version, it was at all times contingent and could be temporarily abandoned during a wartime emergency on the understanding that coverability at the original price of gold would be restored following the emergency. 125 In its weaker forms, the rule functioned more like an aspiration than an operational constraint on decision-making. 126 Fifth, central bank cooperation was required to prop-up the system at key junctures. Commitment to the convertibility rule forced central bankers to find ad hoc compromises to overcome challenges. Most notably, in July 1927, the Chairman of the Federal Bank of New York organized a meeting in his home with the Governor of the Bank of England, the President of the Reichsbank, and the President of the Bank of France. 127 It is noteworthy that only one member of the Federal Reserve Board was present at this meeting, the purpose of which was to coordinate action in order to prop-up sterling. 128 Although, for a time, the endeavor was successful, any system that is so dependent upon personal relationships and ad hoc decision-making is vulnerable to the personalities involved.
Sixth, the incentive structure established by the gold standard incentivized the hoarding of gold. 129 The key aim of a state was to increase its gold reserves or, at the very least, not diminish 117 This, itself, is tied to improved extraction technologies and, in significant measure, chance.  120 See EICHENGREEN, supra note 111. 121 Although the views of Bordo and Eichengreen on the Great Depression differ in important respects, they agree that: It is unnecessary to choose between unstable policies and an unstable international system as the cause of the Great Depression. The two sources of instability interacted and compounded one another. More than any other episode, the Depression revealed the fragility of the gold-exchange standard and the tendency for its operation to aggravate policy mistakes. them. 130 Should a state run out of reserves, it would experience a penalty in the form of being unable to maintain the fixed value of its currency. Conversely, there was no comparable penalty associated with accumulating gold aside from forgone interest. This incentive structure complicated central bank cooperation.
Seventh, Eichengreen and Temin elucidate the powerful framing effect of gold on policy discourse. 131 Over time, the appeal of the gold standard came to rely less on logic or experience but on the rhetoric that shrouded the regime. The regime became intertwined with Victorian and Edwardian virtues such as "thrift, reliability, stability and cosmopolitanism," and gold became synonymous with a "moral, principled and civilized monetary order." 132 This rhetoric went arm-in-arm with policies of internal deflation and wage cuts. This ideological lens contributed to the aggravation of the events culminating in the Great Depression. The most notorious example of puritanical dogma infecting a question of rule adherence is found in the, perhaps apocryphal, advice of Treasury Secretary Andrew Mellon to President Hoover. The Mellon Doctrine, as it would become known, was to the effect that the only way to restore a sustainable economy was to "liquidate labor, liquidate stocks, liquidate the farmers, liquidate real estate : : : purge the rottenness out of the system" so that "people will work harder, and live a more moral life." 133

II. The Bretton Woods System
In light of these shortcomings, and toward the conclusion of World War II, a modified version of the gold standard was established by the Allied forces. The ultimate outcome of the compromise between predominantly the U.S. and UK was to create a pegged-but-adjustable exchange rate system through the establishment of the International Monetary Fund (IMF). One goal was to create credible rules that would foster cooperation and coordination, thereby promoting peace and prosperity. Traditional notions of monetary sovereignty were succeeded by an understanding that the exercise of monetary policy would become subject to rules, and that those rules would be monitored and enforced by the international community. The rules created a compliance mechanism, and two international institutions were established to help administer the new monetary system: the IMF and what would become the World Bank. The agreement listed the primary purpose of the IMF as the promotion of international monetary cooperation through that institution. 134 In this way, the IMF became an instrument for the promotion of tighter fiscal and monetary policy. However, a fundamental flaw of the old gold standard system remained: the inelasticity of the supply of gold. The metal continued to govern an expanding global economy, thereby creating a destabilizing demand for liquidity. 135 Thus, this modified version of the gold standard also proved unsustainable. The core of the system hinged on the perceived willingness and capacity of the United States to convert its liabilities into gold-a commitment of diminishing credibility. 136 130 See O'Rourke & Taylor, supra note 1, at 172. 131 See EICHENGREEN, supra note 111; Eichengreen & Temin, supra note 118, at 3. 132 Eichengreen & Temin, supra note 118, at 3. 133 Eichengreen & Temin, supra note 118, at 21. Although the "Mellon Doctrine" has become well-known, to be fair to Andrew Mellon, we rely on Hoover's own writings many years later as the source of the anecdote. See DAVID KOSKOFF, THE MELLONS 265 (1978). 134 See Article I(i) of the Articles of Agreement of the IMF. The agreement also provided for purposes including the facilitation of growth in international trade, the attainment of high employment levels, the encouragement of exchange rate stability, the establishment of a multilateral system of payments for current account transactions, the creation of confidence in member states by making funds available through the IMF, and the minimization of disequilibrium in balance of payments. Between 1961 and 1968, the main central banks of the Western World embarked on one of the most ambitious attempts at ad hoc central bank cooperation in history: the Gold Pool. 137 There was no written agreement or constitution underpinning the cooperative arrangement. The intergovernmental initiative came from the U.S. Treasury Secretary in 1961. 138 The goal was to keep the market price for gold at its official price. The states coordinated their acquisition and disposal of gold in London for the purpose of stabilizing the gold-dollar parity-the foundation of the Bretton Woods system. The profits and losses arising were shared. In effect, the European states committed to reimbursing the United States for a portion of its gold losses. 139 During this period, the market applied acute pressure to the pegged-exchange rate rule and, by extension, the commitment thereto. Nevertheless, the system worked reasonably well until its eventual collapse. Its collapse inflicted significant losses on the constituent states. In the wake of the March 1968 crisis, an effort was made to maintain a two-tier gold market in which the price of gold for private use would be significantly higher than $35 per ounce, but in which central banks would be limited to that price. That system was short-lived. In 1971, President Nixon effectively ended the ability of foreign central banks to redeem dollars for gold.
And so, one unsustainable international monetary regime anchored by the gold standard gave rise to the unsustainable Bretton Woods system, anchored by a modified gold standard. The Gold Pool was an ad hoc initiative aimed at buttressing the modified gold standard system. Ad hoc cooperation did prolong the existence of the pegged exchange-rate rule but ultimately could not compensate for its inflexibility.
It is worth reflecting on the successes and limits of this ad hoc cooperation. Eichengreen argues that the collapse of the Gold Pool is attributable to the inability of its constituents to prevent freeriding. 140 Toniolo and Clement emphasize the mounting heavy financial losses inflicted on those states. 141 The timing of the breakdown of the system is also important. France engaged in particularly uncooperative behavior in 1965 in an effort to capitalize upon UK and U.S. economic weakness, yet the system survived its free-riding. Bordo, Monnet, and Naef argue that the reason for the collapse of the Gold Pool in March 1968 is attributable to an external shock that the system was unable to cope with. 142 The devaluation of sterling by 14.3% in November 1967 caused a loss of confidence, and contagion quickly spread throughout the system. In particular, the shock spread to the United States. Sterling was, at that time, a second reserve currency. As a consequence, it was the first line of defense to the gold-dollar link. The devaluation of sterling triggered a speculative run on gold, causing unbearable losses for the Gold Pool states. Therefore, the rigidity of the parity rule amplified a shock throughout the system, eventually resulting in its collapse.
In the wake of World War II, the Bretton Woods system facilitated thirty years of low inflation and rapid growth in the western states. However, this was not the consequence of strict rule adherence. Rather, the rules were breached by the more influential countries from the very outset of the system. 143 The primary shortcoming of the parity rule was that it operated to reduce monetary policy flexibility. By circumscribing the practicability of that adjustment mechanism, states were often de facto forced to pursue policies of internal devaluation. The domestic political, social, and  SETTLEMENTS, 1930SETTLEMENTS, -1973SETTLEMENTS, (2005. 142 See Bordo, Monnet, & Naef, supra note 137. 143 For example, in 1949, the UK did not give adequate notice to the IMF in order for it to review its decision to devalue sterling. Eichengreen, supra note 100, at 48. economic consequences thereof inevitably proved unsustainable. Furthermore, the parity rule lacked the flexibility to cope with asymmetric economic growth levels between constituent states. In this way, economic divergence translated into a source of pressure on the fixed exchange rates that sought to diverge accordingly. The rigidity of the rule prevented the market from reflecting the "natural" equilibrium value. Over the long run, this disassociation became unsustainable. 144 Again, in theory, the legal framework was designed to embed a measure of flexibility. It established an institution, the IMF, to play the role of supervising devaluations. In practice, however, states were disincentivized from being seen drawing upon IMF support due to the stigma attached thereto and the potential reaction of the markets. As a result, economically desirable devaluations became a source of political sensitivity. Conversely, once one state sought assistance, other states became more likely to follow in its wake, thereby creating a destabilizing cascade dynamic. Furthermore, the indeterminacy of the language of the agreement circumscribed its operation. There was no definition of "fundamental disequilibrium" within the agreement. Similarly, the agreement was silent as to the test to determine whether an event constituted a legitimate "adjustment" or an impermissible "manipulation." 145 More generally, the regime raised normative and empirical concerns about the institutional capacity of the IMF. Insofar as it is tasked with interpreting its own constitutional framework, whether the IMF, or anyone, enjoys the capacity to distinguish between "legitimate" and "illegitimate" devaluation-assuming that one exists-is open to contest. 146 Equally, the normative legitimacy and functional capacity of the IMF to identify and impose domestic structural reforms on states in vulnerable economic circumstances as a quid pro quo for assistance is, at its kindest, controversial. 147 This applies, mutatis mutandis, to its role monitoring their implementation. Finally, like the gold standard before it, the system was not self-enforcing in practice. When the domestic political costs associated with internal devaluation outweighed the benefits of complying with the rules, the incentive structure favored unilateral devaluation, or "cheating." 148 Put another way, the system lacked an effective "punishment" mechanism that could inflict costs sufficient to dwarf to the benefits associated with "cheating."

III. Comparison of the Legal Regimes
A number of scholars have contrasted the gold standard with the euro. 149 Anachronistic reasoning can be misleading, nevertheless there are a number of useful observations to be noted about the lived experience of the convertibility, parity, and no sovereign lender of last resort (LOLR) rule.
During the gold standard era, domestic commitment to the convertibility rule represented a second-order decision that limited future choice. That is, the rule was used to specify ex ante 144 See Bordo & Eichengreen, supra note 121. 145 Posner & Sykes, supra note 1, at 1056. 146 Indeed, in his critique of the IMF's LOLR function, Goodhart thinks it a myth that it is generally possible to distinguish between "liquidity" and "solvency" in real-time during an economic crisis. See Charles Goodhart, Myths About the Lender of Last Resort, 2 INT'L. FIN. 339 (1999). 147 Jeffrey Sachs has strongly criticized the IMF for its handling of the East Asia Crisis. The world accepts as normal the idea that critical details of IMF programs should remain confidential, even though these "details" affect the well-being of millions. Meanwhile, staff at the Fund are unaccountable for their decisions. The people most affected by these policies have little knowledge or input. In Korea, the IMF insisted that all presidential candidates immediately "endorse" an agreement they had no part in drafting or negotiating-and no time to understand. The situation is out of hand. However useful the IMF may be to the world community; it defies logic to believe that the small group of 1,000 economists on 19 th Street  future outcomes. Collective adherence to domestic convertibility rules had the effect of securing significant international cooperation. The primary distinction between the convertibility rule and the Economic and Monetary Union (EMU) financing prohibition is the source of the respective rules. States were not required by international law to adhere to the convertibility rule, nor did they divest themselves of the ability to depart from the rule. This difference is key because, even in the heyday of the gold standard, policies of internal devaluation were nowhere near as common as sometimes assumed. 150 So too the convertibility rule implied a measure of discretion to be exercised in light of the circumstances at the point of application. Rule adherence was never absolute.
Similarly, the ability of the gold standard to endure was achieved in significant measure through the ability of the core states to cooperate, albeit in an ad hoc fashion. There are unfortunate parallels with the less successful attempts at ad hoc cooperation to sustain the euro during its crisis. The Member States produced a flotsam and jetsam of intergovernmental summits and meetings, the counter-productive decision to pursue fiscal contraction through revised budgetary rules, and the short-term, undercapitalized, ineffectual European Financial Stability Facility (EFSF) and European Financial Stabilization Mechanism (EFSM) that failed to address the core of the crisis. 151 Similarly, although better than before its introduction, the ESM currently fails to offer a credible set of rules capable of addressing a significant economic challenge, like the Covid-19 pandemic. It is under-capitalized, it requires the recipient to agree to a program of structural reforms that can take months to negotiate, and-as so forcefully argued by the Italian government -such reforms during a severe crisis may not be appropriate. 152 This is not to imply that the ability of states to cooperate during the gold era was not also circumscribed; they were unable to formalize, let alone institutionalize, a set of rules such that deviation from the gold standard, when justified, and re-application, when appropriate, could be achieved in an orderly fashion. Therefore, although states could, and did, suspend the operation of the convertibility rule and devalue their currency, the rule nevertheless reduced monetary flexibility during economic crisis.
Both the convertibility rule and the no sovereign LOLR rule amplified shocks throughout the system and hampered the ability of monetary authorities to act as LOLRs. States were also incentivized to hoard gold to the detriment of others, just as states were incentivized to run excessive balance-of-payments surpluses in the EMU. 153 Blanchard, Erceg, and Linde make the case that fiscal expansion in the core Members could have a large and positive impact on the GDP of the periphery, particularly during a liquidity trap. 154 An important point of disassociation between the classical gold standard and the EMU is that the latter is located in a time when the consequences of internal devaluation are understood by all; to wit, market actors and states, which was not the case during the classic gold standard era. That is to say, the credibility attached to 150 See O'Rourke & Taylor, supra note 1, at 174. the no sovereign LOLR rule reflects the lived experience of the rule in the eyes of market actors, not just its wording. Finally, the framing effect of the gold standard invites parallels with the SGP. Just as the role of gold within the convertibility rule became confused with virtues such as thrift, reliability, and stability, the self-defeating rules in the SGP invite confusion with fiscal prudence. As a consequence, the attractiveness of rule adherence constrained counter-cyclical economic policies during the Eurozone crisis and thereby amplified the crisis.
Just as the gold standard era gave rise to the IMF, so too the original role of the ECB has evolved in the wake of the crisis to include the supervision of internal devaluation. This new role has been institutionalized in the form of the ESM Treaty. In fact, the ECB performs this role arm-in-arm with the IMF. Another obvious parallel is that, from the outset, the rules were not respected by the core members of either regime. Although more flexible than the gold standard, the parity rule was insufficiently flexible to prevent disassociation from economic performance. As a consequence, the IMF, like the ECB, continues to house a struggle over its operational norms and the legitimacy and capacity of that institution to formulate and monitor the economic reforms that form a quid pro quo for financial assistance.
In wake of this analysis, we now turn to consider the euro project, first in theory and then in practice. In particular, we focus on the no sovereign LOLR rule in light of the lived experience of the convertibility and parity rules.

D. The Economic and Monetary Union
Since the Treaty of Rome, European monetary cooperation was the subject of intermittent rhetoric and spasmodic policy coordination. 155 Indeed, McNamara is undoubtedly correct when she says that the ECB represents "the institutional expression of a process of monetary integration that began early on in the history of the European Union [,] but underwent a multitude of setbacks before becoming a reality." 156 Historical examples of monetary unions provide little cause for optimism, and their structural shortcomings are obvious; monetary unions are characterized by decentralized fiscal policy, yet centralized monetary policy. 157 As Snyder points out, the "EMU was created mainly for political reasons." 158 Likewise, Feldstein, who in 2012 considered the project a failure, identified the initial impetus for the euro as political and not economic. 159 According to Feldstein, the project aimed to promote a European identity, to shift monetary responsibility from the Members to Germany, and to increase Europe's influence in world affairs. Nevertheless, the analysis that follows emphasizes the principle of neutrality and evaluates the regime, not in political terms, but in terms of law. 160 At the beginning of 1999, the founding eleven members 161 of the Eurozone agreed to fix their exchange rates as against one another and lock that parity into a legal regime. 162 In this way, the Members utilized the Treaty of Maastricht, along with an institution, to administer their collective monetary policy-the ECB-as their commitment technology. 163 By divesting themselves of legal control over the currency that circulated within their borders, and by issuing debt in a currency that they did not fully control, the Member States established a level of commitment to a fixed exchange rate regime that went beyond the commitments implied by either the gold standard, the Bretton Woods system, or the ESM. Moreover, they circumscribed the ability of the ECB to operate otherwise than the guardian of what, in 1992, Folkerts-Landau and Garber described as a "monetary rule." 164 That monetary rule was that the money supply should be regulated to ensure low and stable inflation, and that the ECB would not act as LOLR to the Members. The ECB was not established to act as a historic central bank, leading Folkerts-Landau and Garber to predict that the single-minded pursuit of price stability could be achieved only if the Members agreed to repress their financial systems and securitization markets in particular. Otherwise, the ECB would inevitably be required to play the LOLR role historically played by central banks, notwithstanding its formal mandate. Similarly, Kenen and Meade-approvingly adopting the language of Schinasi-considered the ECB to be originally formulated as "the ultimate 'narrow' central bank" because it was focused on price stability and lacked LOLR powers. 165 They attributed this choice to the concerns over "moral hazard" that led to Germany preventing the Bundesbank from serving as LOLR.
The ECB's mandate and powers are now enshrined in the Treaty on the Functioning of the European Union (TFEU). 166 It is required to act within the limits of the powers conferred upon it by the Treaties. 167 In an effort to define its own governing norms, the ECB has declared that it considers its legal framework to "have gained 'constitutional' status." 168 The functions and objectives of the ECB are enshrined in Article 127 of the TFEU, and paragraph 1 thereof limits the primary objective of the ECB to maintaining "price stability"-in other words, the control of inflation. 169 Without prejudice to low and stable inflation, the ECB shall support the general EU economic policies with a view to contributing to the achievement of the objectives set forth in Article 3 of the TFEU. Although the primary objective of the ECB is to maintain price stability, 160 For accounts of the Maastricht negotiations, and in particular, the "monetarist" versus "economist" advocacy coalitions, see DYSON & FEATHERSTONE, supra note 5, at 142. contributing to the stability of the financial system is an enumerated objective per Article 127(5). 170 Nevertheless, this contribution to financial stability is circumscribed by the restrictions placed upon the exercise of its powers by the treaties and the absence of historic LOLR features described below. Article 123 of the TFEU prohibits the provision of any credit facility, including overdrafts, by the ECB to a Member State. 171 Importantly, the ECB is prohibited from purchasing a debt instrument directly from a Member State. 172 The purpose was to prohibit the ECB from providing monetary financing to the Member States. 173 Council Regulation 3603/93 extends the spirit of the prohibition on direct purchases into transactions in secondary markets. 174 Article 125 of the TFEU prohibits the Union or its Member States from assuming a liability on behalf of another Member State, save for in a narrow exception relating to joint venture public projects: The "no bailout" provision. 175 Additionally, Article 122(2) provides a mechanism for the provision of financial assistance to a Member State that "is in difficulties or is seriously threatened with severe difficulties caused by natural disasters or exceptional occurrences beyond its control." 176 Furthermore, the second indent of Article 18.1 of the Statute of the ESCB and the ECB shields Drawing a technical distinction between direct and indirect purchased debt instruments became a feature of the justification of OMT by the CJEU in Gauweiler. The extent to which the consequence of purchasing debt on a secondary market, as opposed to directly from the Member, is in fact different is, at its kindest, the subject of debate. See Claes & Reestman, supra note 8; Hinarejos, supra note 8. 173 For an analysis of the prohibition on monetary financing, see Christian Hofmann, Greek Debt Relief, 37 OXFORD J. LEGAL STUDS. 11 (2016). 174 "Whereas Member States must take appropriate measures to ensure that the prohibitions referred to in Article 104 of the Treaty are applied effectively and fully; whereas, in particular, purchases made on the secondary market must not be used to circumvent the objective of that Article." See Council Regulation 3603/93, 1993 O.J. (L 332) 1-3 (EC) (specifying definitions for the application of the prohibitions referred to in Articles 104 and 104b (1) of the Treaty). 175 The text provides as follows: 1. The Union shall not be liable for or assume the commitments of central governments, regional, local or other public authorities, other bodies governed by public law, or public undertakings of any Member State, without prejudice to mutual financial guarantees for the joint execution of a specific project. A Member State shall not be liable for or assume the commitments of central governments, regional, local or other public authorities, other bodies governed by public law, or public undertakings of another Member State, without prejudice to mutual financial guarantees for the joint execution of a specific project. 2. The Council, on a proposal from the Commission and after consulting the European Parliament, may, as required, specify definitions for the application of the prohibitions referred to in Articles 123 and 124 and in this Article.

176
"Where a Member State is in difficulties or is seriously threatened with severe difficulties caused by natural disasters or exceptional occurrences beyond its control, the Council, on a proposal from the Commission, may grant, under certain conditions, Union financial assistance to the Member State concerned. The President of the Council shall inform the European Parliament of the decision taken." TFEU art. 122(2). the Eurosystem from counter-party risk when dealing with private financial institutions. It ensures that credit institutions, and other market participants, provide adequate collateral when engaging in credit operations with the ECB and national central banks (NCBs). 177 The instruments did not provide for a fiscal union, a banking union with risk sharing, or an explicit LOLR to either the Eurozone banking system or to sovereigns. 178 This stands in contrast to the United States, for example, where the federal government takes carriage of a large proportion of banking regulation, is responsible for banking failures, and provides a deposit insurance scheme. 179 At a national level, NCBs retain an exceptional ability to provide Emergency Liquidity Assistance (ELA) to domestic credit institutions, albeit under certain circumstances. However, pursuant to Article 14.4 of the ESCB Statute, the Governing Council-by a majority of two thirds of the votes cast-can declare that the ELA interferes with the objectives and tasks of the ESCB. 180 Each Member of the Eurozone divested itself of control over its currency, and with that, its ability to depreciate or devalue its own currency. In effect, the process of adjustment within the single currency is comparable to that of a fixed exchange rate system. 181 As with the gold standard, exchange rates are fixed-albeit in the case of the euro through their elimination-while capital markets are open, implying consistent monetary policy across the constituent states. Prior to the euro, the Member States issued sovereign bonds in a currency that their central bank controlled. De Grauwe suggests that the most useful way of thinking about the effect of the EMU is that Member States signed up to issue debt in a "foreign currency." 182 In this way, the Members provide no guarantee to the holders of their sovereign bonds that they will have the liquidity necessary to discharge their future obligations, as they can no longer simply create the requisite money via their central bank. 183 To combat a self-fulfilling debt roll-over crisis-in which sovereign debt holders fail to coordinate on rolling over maturing debt-a monetary union requires a clear, transparent, sovereign LOLR. 184 It is not sufficient to have a central bank tasked with an inflation mandate because, during a rollover crisis, the central bank must eliminate coordination failures among lenders. 185 This is particularly so when the union is made up of high and low debt countries who do not enjoy aligned monetary policy preferences. Notwithstanding this fact, the aforedescribed provisions effectively established a prohibition on the ECB acting as sovereign LOLR to the Members. This is because, through the provision of financial assistance to a Member, the ECB might create a redistributional risk in the event that the Member simply defaults 177 "In order to achieve the objectives of the ESCB and to carry out its tasks, the ECB and the national central banks may : : : conduct credit operations with credit institutions and other market participants, with lending being based on adequate collateral." ECB/ESCB art. 18.1. 178 In the context of the banking union, the Eurozone crisis brought developments such as the single supervisory mechanism, the single resolution mechanism, and the European deposit insurance scheme. on its debts and exits the currency zone, for example. 186 Not without good reason: Although the treaties have no provision for the withdrawal of a Member from the Eurozone-other than exiting the EU-with all that would follow from such a decision, as we shall see, euro exit, or redenomination risk, was widely considered during the Eurozone crisis. 187 Although hindsight is 20/20, U.S. macroeconomic, 188 political-economic, 189 law and economic 190 scholars all expressed profound misgivings about the EMU prior to the minting of the first euro. Within legal studies in the EU there was also skepticism regarding the viability of the legal framework. 191 In contrast, European scholarship was, by and large, supportive of the idea based upon an assumption that economic "convergence" would overcome the asymmetry of the monetary union with only economic cooperation in the context of an incomplete internal market. 192 From its inception to the global financial crisis, the EMU precipitated asymmetric flows of capital from high to low per capita income and productivity countries. 193 The first nine years of the euro should have been spent in a state of concern regarding the lack of convergence other than between economies with relatively strong institutions. 194 191 The concerns of these scholars ranged considerably. For example, in a provocative 1999 paper that still rewards close reading, Francis Snyder noted that the project was meant to symbolize a milestone in integration, anchor the internal market, crystallize political integration, and establish the EU's presence in international markets. However, he feared that it may prove "a millstone around the neck of a fledgling, causing the young European Union to sink in the turbulent waters of deflation, enlargement, postmodern politics, and globalisation." Francis Snyder, EMU Revisited: Are We Making a Constitution? What Constitution Are We Making? (Eur. Univ. Inst., Working Paper No. 6, 1998). Furthermore, Hodson and Maher expressed deep concerns regarding the legitimacy of the ECB, and hence the EMU, and predicted that this could, in turn, affect the credibility of monetary policy. Presciently, they were concerned that the shortcomings in "conscious legitimacy" would result in a dele- mandate, the asymmetry of external balances appear to have been noted but insufficiently tackled. 195 Prevailing economic and political-economic theory suggested that national institutions were deeply rooted in the history of a state, and that short-term change was optimistic. 196 Therefore, the economies that started out with strong institutional advantages would, in fact, widen their lead. 197 Convergence proved a mirage.
By removing currency depreciation and devaluation, traditional adjustment mechanisms used by the Members without building a banking union, a fiscal union, centralized financial regulation, or even effective fiscal policy, the experiment was nothing if not bold. Moreover, currency unions in general create a "free-rider" problem: States are incentivized to borrow in the common currency and, when their obligations became unsustainable, secure bailouts by the other members. 198 The attempt to solve this free-rider problem came in two parts. 199 First, the Stability and Growth Pact (SGP) set an arbitrary annual budget deficit of 3% of GDP and the stock of public debt of 60% of GDP. According to Eichengreen, writing in 2003, that "has no basis in economic logic." 200 In theory, these rules were profoundly misconceived because imposing the fines provided for by the pact would only serve to aggravate the problems of a distressed government and encourage the very debt crisis that the mechanism was intended to avert. 201 The rules were also misplaced in practice and actually diverted attention from the true source of the Eurozone crisis. Although the Eurozone became a full-blown sovereign debt crisis, that fact can obscure its origins. Between 2002 and 2007, France and Germany had debt to GDP ratios far above those of Ireland and Spain, which appeared to be in relatively good public health until the eve of the crisis. 202 Belgium and Italy had debt to GDP ratios of 100% at the start of the crisis yet did not require programs of adjustment. By contrast, Ireland and Spain had ratios of 40% and were running budget surpluses. 203 Leaving aside Greece, which was not an original Member and is a special case, 204 the sovereign debt crisis was deeply intertwined with a private debt banking crisis and 195 See, for example, the comments of the Commissioner for Economic and Monetary Affairs, Joaquin Almunia, writing in 2008 in the foreword to "EMU@10": A full decade after Europe's leaders took the decision to launch the euro, we have good reason to be proud of our single currency. The Economic and Monetary Union and the euro are a major success. For its member countries, EMU has anchored macroeconomic stability, and increased cross border trade, financial integration, and investment. For the EU as a whole, the euro is a keystone of further economic integration and a potent symbol of our growing political unity. And for the world, the euro is a major new pillar in the international monetary system and a pole of stability for the global economy. Iversen et al., supra note 179; European Commission, EMU@10-Successes and Challenges After Ten Years of Economic and Monetary Union, 2 EUR. ECON., May 7, 2008, https://ec.europa.eu/economy_finance/publications/pages/publication 12682_en.pdf. 196 macroeconomic imbalances within the Eurozone. Insofar as the SGP was not taken seriously by Members, this was entirely predictable. Again, Eichengreen noted that, given that the SGP rules were arbitrary and lacking in any "sound economic rationale" bearing "only the loosest relationship to the ultimate objective of debt sustainability," they were not viewed as legitimate or "taken seriously." 205 In 2004, the Commission sued the Council for its effective suspension of the excessive deficit procedure against France and Germany, to little or no avail. 206 The second attempt to address the free-rider problem was the inclusion of the "no bailout," "no monetary financing," and "no overdraft" clauses in the TFEU. Together, these were supposed to signal that a sovereign default would occur if a Member reneged on its debt obligations. I have argued elsewhere that one plausible explanation for the failure of sovereign bond spreads to adequately reflect the prospect of default might lie in the fact that there was a clear mismatch between the framing of Articles 123 and 125 of the TFEU and the political-economic exigencies required to sustain a single currency. 207 Instead, these provisions might be better understood as serving a political-expressive function, as opposed to a concrete, sanctionable legal function. This function failed in that sovereign yields converged on German levels until the eve of the crisis. 208 The handling of the liquidity shock from the U.S. sub-prime mortgage crisis by Eurozone policymakers converted a sudden-stop in credit into a full blown sovereign debt crisis. 209 Prior to the global financial crisis, European banks readily consumed U.S. securities-many of which were backed by sub-prime mortgages. 210 This led to a sudden stop in credit in Europe. 211 Every Member that was negatively affected in a significant manner was, however, running a current account deficit. 212 By contrast, none that were running a surplus were significantly hit. The absence of a sovereign LOLR amplified liquidity shocks so that rising risk premiums and deteriorating budget deficits stemming from those higher debt servicing costs negatively reinforced one another. Some Members were forced to assume the debts of their banking systems, rendering them unable to access credit through traditional markets and-for all intents and purposes-bankrupt. 213 The Members could not devalue their currency. Matters came to a head with Greece, which, by early 2010, clearly required a quick sovereign default or significant financial assistance. Although some members of the ECB resisted the provision of a bailout, 214 even the German 205 Eichengreen, supra note 200, at 8. Philip Lane organizes the relationship between the EMU and European sovereign debt crisis into three phases. First, the legal architecture of the euro plausibly increased fiscal risks in the pre-crisis period. Second, once the banking crisis began to take root, these design flaws in the EMU amplified the fiscal impact of the crisis dynamics through multiple channels. Third  216 In December 2011, the Head of the ECB, Mario Draghi, announced a modified version of the ECB's Long-Term Refinancing Operations (LTRO), which provided banks with three-year loans at 1% with substantially reduced collateral requirements. 217 This "Sarkozy carry trade" meant that banks borrowed from the ECB at 1% and purchased sovereign debt at a significantly higher yield. 218 Other attempts to cope with the crisis included: The provision of financial support in exchange for structural reforms overseen by the Troika; 219 the establishment of the temporary European Financial Stability Mechanism (EFSM) 220 and European Financial Stability Facility, 221 which were replaced by the European Stability Mechanism (ESM) for new bailouts; 222 and the ECB's Securities Markets Program. 223 In at least three cases-Ireland, Italy, and Spainthe ECB sent letters to Members of the Eurozone. In the case of Ireland, receipt of the letter was immediately followed by a request for a bailout. 224 In the case of Italy and Spain, they contained detailed instructions from the ECB of the structural reforms and fiscal consolidation expected of them. 225 Likewise, the ECB took a strong line on the question of burden sharing with bondholders. 226 In any event, the ECB announced that it would purchase the bonds of distressed Members on the secondary market, as opposed to directly, thereby supporting them notwithstanding the purpose of Article 123 of the TFEU. 227 Nevertheless, by 2012, the break-up of the Eurozone was a very real possibility. Cyprus, Greece, Ireland, and Portugal had required full bailouts, while Spain had enjoyed a partial bailout focused on its financial system. Italy did not receive a bailout but came close to it. The turning point did not come from a new law; rather, it came in July 2012, when Mario Draghi gave his "whatever it takes" speech to the "Global Investment Conference" in London. 228 In September 2012, the ECB issued a press release setting out the details of Outright Monetary Transactions (OMT). 229 The ECB intervened in the crisis in a quasi-unilateral way. In effect, OMT permit the ECB to buy sovereign bonds without any ex ante limit of a distressed Member State, albeit on the second-hand market, to keep its yields close to that of Germany, as long as that Member State has a credible fiscal plan to ensure the medium-term viability of its debts. 230 Whelan considers the ECB's OMT program as a necessary part of the Eurozone's policy architecture because it is "effectively a sovereign lender of last resort programme in which it [the ECB] is willing to lend to governments that it views as solvent [,] provided they co-operate with a programme of measures designed to restore market confidence." 231 Therefore, we can summarize the position as follows. Prior to the "whatever it takes" intervention of the ECB, the ECB broadly operated pursuant to a rule: It would not act as sovereign LOLR to the Members. This was justified on the basis of the prohibition on monetary financing found in Article 123 of the TFEU, and perhaps also because doing so might constitute a bailout of sorts as mentioned in Article 125 of the TFEU. In reality, the operation of the rule was never clean-cut; the ECB did provide indirect support to Members through emergency liquidity assistance (ELA), for instance the Sarkozy carry trade. Following the "whatever it takes" intervention and the promise of OMT, the rule was functionally softened to the following rule-with-exceptions: The ECB will not act as sovereign LOLR to a Member-except in circumstances A, in which case it will act as sovereign LOLR to that Member. A was defined as including a Member agreeing to and implementing a program of macroeconomic reforms with the EFSF/ESM supervised by the Troika.
In Gauweiler, the CJEU declared that the ECB's OMT, even in the absence of any ex ante quantitative limit, was consistent with the treaty instruments. 232 The decision of the CJEU follows the spirit of Pringle, which decided that the ESM Treaty was also consistent with EU law. 233 Hinarejos persuasively argues that, together, Pringle and Gauweiler represent the judicial ratification of a shift from rules-based EMU toward a policy-based one in the wake of the crisis. 234   . 234 See Hinarejos, supra note 8. sovereign LOLR rule, but this greater freedom has now been called into question, notably by the German Federal Constitutional Court (GFCC). 235 The "whatever it takes" intervention of the ECB saved the euro, but it did not solve the problem of anemic growth and the specter of secular stagnation. 236 As the central banks around the globe pursued programs of quantitative easing, the ECB followed suit via the public sector purchase program (PSPP). 237 The program provides for the open-ended purchase of the sovereign bonds of Members and the securities of European institutions, until the ECB sees "a sustained adjustment in the path of inflation which is consistent with the aim of achieving inflation rates below, but close to, 2% over the medium term." 238 Again, the program was challenged before the GFCC in Weiss, which, in turn-and only for the second time ever-sought clarification from the CJEU as to its compatibility with the limits implied by the Gauweiler decision; particularly, the treaty prohibition on monetary financing. Again, to the surprise of no one, the CJEU proved reluctant to engage in what Dawson and Bobic called an "intensive and meaningful proportionality review," but instead applied a narrow proportionality test. Thus, the CJEU accepted the procedural safeguards proposed by the ECB without question, so that, as with Gauweiler, "[t]he common thread : : : is that ultimately the ECJ will do, and appears to have done, whatever it takes to save the euro." 239 Despite the pandemic, and in contrast to the aftermath of the sub-prime crisis, sovereign yields remain ultra-low. Therefore, in light of the effect of the "whatever it takes" announcement, the promise of OMT on sovereign debt yields, and the announcement of PSPP and PEPP, the functional rule can be perceived as shifting closer to the following presumption, developing from a rule-with-exception: Act on the assumption that the ECB will act as sovereign LOLR to a Member-unless and until circumstances A [are shown to obtain], in which case, the ECB will stop [or reconsider or do something else]. A being that the Member is insolvent or is unwilling to co-operate with a program of measures designed to restore market confidence.
In sum, the ECB and the CJEU have condoned an interpretation of the treaty rules which effectively accommodate the creation and development of a sovereign LOLR for the ECB. On the face of it, this sits uncomfortably with the prohibition on monetary financing and raises legitimate concerns of free-riding, moral hazard, and an absence of democratic oversight. This was done by the ECB announcing that it would purchase the debt of distressed Members on secondary markets subject to conditions. The ECB did in fact purchase significant quantities of sovereign debt through its quantitative easing (QE) policies, albeit again subject to conditions. These initiatives were primarily justified on the basis of monetary policy, as opposed to financial stability or supporting the economic policies of the union. They stabilized markets and promoted growth while, as we shall see, legal scholars expressed concern about the way the original treaty rules had been stretched, if not exceeded. Moreover, PEPP is a blend of OMT and QE that has contributed to ultra-low borrowing costs for Members, despite the economic shock of the pandemic. Hence, in the next section, we return to a discussion of rules, choice, and the re-imagining of the monetary financing prohibition to accommodate the establishment of a sovereign LOLR. 235 E. "You Shall Not Crucify Mankind Upon a Cross of Gold" 240 The ECB, supported by the CJEU, has signaled itself sovereign LOLR to the Members, apparently saved the euro, and-to date-played a highly positive role in diminishing the extent of the economic impact of Covid-19 on the Members. The formal account of the trifecta of interventions captured by OMT, PSPP, and PEPP considers them consistent with the treaty provisions, albeit the latter prospectively so.
In Gauweiler, the GFCC, for the first time, asked for a preliminary ruling from the CJEU regarding the compatibility of the ECB's OMT program with EU law. Although Advocate General Cruz Villalón was troubled by the ECB involving itself in both the economic reforms and debt purchasing, 241 one argument before the GFCC was that the program constituted economic and not monetary policy and violated the prohibition on monetary financing. In the reference, the GFCC indicated certain limits that might render it consistent with the constitutional identity of the German Basic Law. The GFCC did not want the program to interfere with the conditionality implied by the ESM/EFSF, yet it wanted limitations on the quantity of the purchases, the length for which they would be held, and the possibility of debt reduction. The GFCC wanted to ensure consistency with their program of integration. The CJEU found that the object and instruments of the OMT program fell within the scope of monetary policy, and that the fact that the program has indirect effects on economic policy did not classify it as economic policy. The CJEU also found the program appropriate and proportional to its objectives on the basis of a thin review. All of this is to say, the CJEU found that the ECB could, without any ex ante limit, purchase the debt of a distressed Member without troubling the prohibition on monetary financing. 242 In particular, the approach of the ECB and CJEU rests largely on the claim that the ECB is not acting in a manner that is functionally equivalent to breaching the prohibition on monetary financing when purchasing sovereign debt. 243 Empirical questions loom large. Suffice it to say, Listokin suggests that it is hard to dispute the GFCC's underlying concern regarding OMT as "buying the long-term sovereign debt of some Eurozone nations [,] but not others [,] with money created by the central bank is just about the definition of monetary financing." 244 In ordinary times, a prohibited act that is "laundered through third parties" ought not be deemed legal by a court. 245 Similarly, Amarello argues that "the massive purchases of government bonds clearly have the equivalent effects of purchases" from Members, where investors in the primary market are "confident that the ECB will purchase their bonds within a certain period due to OMT." 246 The consequence of OMT, he goes on, would be to utilize market participants as "simple intermediaries," allowing Members to be "indirectly financed by the central bank." The overriding concern is that the original prohibition on monetary financing has been rewritten, such that it is now 240 William Jennings Bryan, Address to the Democratic National Convention in Chicago (July 9, 1896). 241 Opinion of Advocate General Villalón at para. 123., Case C-62/14, Gauweiler v. Deutscher Bundestag (June 16, 2015). 242 The decision implied the following conditions: (1) purchases should not be announced; (2) their volume should be limited from the outset; and (3) there should be a minimum period between the issue of the government bonds and their purchase by-technically speaking-the European System of Central Banks (ECSB), which should be defined from the outset in order to minimize the issuing conditions from being distorted. effectively allowable as an indirect consequence of monetary policy. 247 Even if this distinction were plausible, so the argument goes, the rules do not provide for indirect monetary financing; it is not what was agreed in the Treaty of Maastricht, nor was it subsequently incorporated into EU law by the Members. De Grauwe, by contrast, argues that through its secondary market purchases, "the ECB does not provide credit to governments," but rather the holders of the bonds who are typically financial institutions. This implies that, legally, "[i]n no way can this be interpreted as monetary financing of government budget deficits." 248 Although, De Grauwe does go on to acknowledge that, "in practice [,] the distinction [is] blurred." If a bank is pressured by its national treasury to purchase its newly issued sovereign debt, then the consequence may come close to the financing of a budget deficit by the ECB.
More importantly, the GFCC's and CJEU's judicial dialogue regarding whether, and to what extent, safeguards exist such that OMT will not function to alleviate the pressure on a Member to undertake the economic reforms required by a program of adjustment agreed with the ESM, largely misses the point. The effect of the ECB announcing itself as a sovereign LOLR is that OMT was never operationalized, but as we have seen, from the "whatever it takes" intervention onwards, the sovereign debt yields of the periphery collapsed to near convergence with that of Germany. Therefore, Italy and Spain did not enter formal ESM programs because they enjoyed the benefits associated with lower sovereign debt yields. It was the credible promise of a sovereign LOLR that alleviated the need for the economic reforms that would have been a sine qua non of ESM financial support. 249 In this context, in Weiss, the CJEU revisited Gauweiler to note that the ECB must build safeguards into PSPP to ensure that the purchases on secondary markets are not equivalent to direct purchases, such that they reduce the impetus for a Member to pursue sound budgetary policy. 250 The CJEU went on to find that the procedural safeguards in PSPP, although weaker than in OMT, satisfy the requirements implied by the prohibition on monetary financing.
But again, much rests on the asserted distinction between direct and indirect sovereign debt purchases, and the assertion that OMT is primarily an element of monetary policy; though it is a vehicle through which distressed Members may be provided with financial support which is closely linked to economic policy, a competence of the Member States and the purpose of the ESM. Similarly, like OMT, PEPP does not require the symmetric purchase of sovereign debt.
In any event, assuming the CJEU's reasoning to be persuasive, the ECB has a narrow formal mandate reflected in a governance structure that has not broadened in conjunction with increased distributional consequences flowing from its choices. That is, from a governance perspective, form has not followed function. The GFCC have expressed concerns regarding the parliamentary accountability of the ECB in the performance of its sovereign LOLR role. Those concerns were foreshadowed by Yowell when he argued that the new role "should be a cause of concern rather than comfort, for it means that bond and stock markets are being distorted by the expectation of monetary financing of public debt [,] and a belief that the ECB has now become a lender of last resort in sovereign bond markets." 251 Yowell is far from alone in worrying that rule of law is being replaced by rule of experts. Joerges-commenting on the first of the CJEU's crisis decisions, like the ESM-notes with frustration the "irritating" oscillation of the Court between strictly formalist arguments and "sudden 247 See Yowell, supra note 218, at 104. 248 DE GRAUWE, supra note 182, at 183. 249 Blyth argues that it was ECB policy and not public sector cuts that lowered and stabilized the sovereign debt in the Eurozone. In his view, so long as the markets believe that the ECB will engage in bond buying if yields spike again, then those yields will stay down. See MARK BLYTH, AUSTERITY: THE HISTORY OF A DANGEROUS IDEA 251 (2013). 250 See Weiss, Case C-493/17 at paras. 106-107. 251 Yowell, supra note 218, at 199. Putting aside the jurisdictional issues associated with doing so, the GFCC echoed Yowell's views in Weiss. See Weiss, Case C-493/17 at paras. 180-82, 205-06 (revealing the "considerable concerns" of the GFCC). turns" toward "an imagined telos." 252 He decries as "deplorable" the contractionary reasoning of the CJEU in Pringle and joins Everson's plea for "legal honesty." 253 Given that, through the selection of different methods of interpretation, one can beat a path toward different conclusions, Joerges requires a "meta-norm" to guide analysis. 254 In the absence of such a norm, what one makes of the decisions of the CJEU and GFCC in Gauweiler and Weiss is, in significant measure, a function of the perspective from which one views European integration more generally.
The credit crunch that became the Eurozone sovereign debt crisis manifested an existential threat to the European integration project. And so, there was little doubt that the CJEU would undertake the "[H]erculean struggle with the law" necessary to approve OMT. 255 Listokin suggests that: : : : these were not ordinary times. Arguably, the ECJ's expansive reading of the Maastricht Treaty can be justified as a necessary response to exigent circumstances. The constitutional structure of the Maastricht Treaty, which likely prevented OMT, was failing when the program was announced. The ECB and the ECJ faced a stark decision: either functionally "amend" the monetary financing prohibition of the Maastricht Treaty by enabling OMT, or allow the Euro currency union possibly to fail. The ECB and the ECJ chose to "amend" the treaty. 256 Yowell also views the "whatever it takes" intervention and promise of OMT as a likely breach of Article 123-and possibly also Article 125-of the TFEU as they were originally conceived, and dares to pose the awkward question: Should the ECB have saved the euro? Yowell acknowledges the political-economic realities required to sustain the single currency and their potential incompatibility with the prohibition on monetary financing. Moreover, he even allows for the possibility that some legal actors are justified in certain emergencies in violating the law. Nevertheless, he cautions against overlooking the ECB transgressing its mandate to save the euro. Insofar as the ECB was the only institution capable of saving the euro, this is testament to the fact that there is an absence of democratic will to move toward fiscal integration. For Yowell, "if the ECB is the only institution that can save the Euro, then that is a strong reason for it not to attempt to save the Euro." For Yowell, the consequence of the ECB's potential monetization of the debt of the periphery may well leave it as a kind of fiscal authority redistributing wealth absent any, or any adequate, mandate or oversight-a concern that might underlie the GFCC's strongly worded judgments.
Yowell's argument is well made, and the absence of any, or any sufficient, democratic will cannot be brushed aside. Likewise, the concern voiced by the GFCC, perhaps imperfectly, regarding the dearth of parliamentary accountability cannot be ignored. Moreover, as we have seen, this dilemma was a foreseeable consequence of the Maastricht Treaty. Nevertheless, notwithstanding the legitimate normative concerns it raises, this study finds itself in deeper sympathy with the ECB's choice to avoid the potential abrupt collapse of the currency in light of the foreseeable welfare effects that would flow therefrom. Recalling Sunstein's analysis of rules, the prohibition on More particularly, Joerges objects to the CJEU taking a strict reading of Article 122 such that it engages financial assistance provided by the Union only and not granted by the Members. See Joerges, supra note 252. Yet, then when interpreting Article 125, it "takes a turn to an imagined telos" and infers from "preparatory work relating to the Treaty of Maastricht" to imply a "logic of the market" to prompt budgetary discipline, which itself purportedly contributes to "a higher objective, namely, maintaining the financial stability of the monetary union." Everson, supra note 34. 254 See Joerges, supra note 252. Listokin makes plain how seriously he takes the welfare effects of inadequate demand: "A legal decision that is right when the economy is healthy may well be wrong at the zero lower bound on interest rates." LISTOKIN, supra note 244, at 6, 90. financing, as a rule, was never likely to function in absolutist terms-especially when regard is had to the historical-legal context of exchange rate systems and monetary cooperation projects. When placed into historical context, Articles 123 and 125 of the TFEU appear closer to politically convenient compromises that express aspirational ideals than to sober rulemaking. The circumstances necessitating rule departure were not articulated ex ante for political reasons, but this did not mean that no exceptions would ever exist. "Central banks were put on this earth to be lenders of last resort," 257 and so, for ill or for good, the inability of the Members to agree upon the exceptions required the ECB to determine those exceptions at the point of application. Central banks are in the business of making choices in complex, uncertain situations where both the nature and scope of appropriate support, and the distinction between liquidity and solvency, are contestable. The ECB has been forced to either make such choices, or risk collapsing the entire currency. In light of the approval by the CJEU of the expansion of sovereign debt purchases in Weiss, and the further softening of the constraints on the ECB announced as part of PEPP, the conditions for rule departure have become better elucidated and more transparent. Nevertheless, forcing the ECB to do so has come at a significant cost, raising legitimate concerns vis-à-vis the extent of its parliamentary accountability and democratic oversight more generally.
As we have seen, under the gold standard and the Bretton Woods system, the convertibility rule, implicitly, and the parity rule, explicitly, retained a measure of discretion at the point of application; rule non-adherence was an option in certain circumstances. In the case of the euro, the sum and substance of the treaty provisions is to prohibit bailouts, overdrafts, and monetary financing. Yet, in the wake of the Eurozone crisis, arguably all of these have been provided absent any amendment to Articles 123 or 125 of the TFEU. Placed within the genealogy of monetary rules, the intervention of the ECB into the euro crisis-through its "whatever it takes" message and promise of OMT-represents little by way of historical anomaly. The ex ante specification of an outcome embedded in a rule ran up against the realworld requirement for discretion at the point of application. The effect of the intervention of the ECB, supported by the Members as signatories of the ESM-albeit an instrument of international and not initially EU law-and the CJEU, was to soften the ex ante rule embedded within the treaty instruments to a rule-with-exceptions, and increasingly, to construct a rule that appears to function more like a presumption, despite the concerns now raised by the GFCC. So long as there is a disruption to monetary policy transmission or a threat to the singleness of the single currency, if a Member agrees to the ECB's conditions and has a credible fiscal plan to ensure the medium-term viability of its sovereign debt, then that Member may, in practice, receive indirect financial support notwithstanding Article 123 of the TFEU. 258 As we have seen, often there is no operational distinction between a rule-withexceptions and a presumption. The difficulty with rules-with-exceptions manifests under conditions of uncertainty where it is unclear whether rule adherence or rule departure is required by the circumstances. Difficult choices are made at the point of application, during which time paralysis can ensue, as neither choice is justified. This is what happened from 2008 up until the "whatever it takes" intervention. The ECB then declared itself sovereign LOLR subject to conditions. In doing so, it raised concerns over the extent of its democratic accountability. Over time, and in the wake of judicial review, the conditions for rule departure are becoming increasingly honed and refined. By crafting clear, transparent, and credible sovereign LOLR rules, the ECB is increasingly operating in practice pursuant to something more akin to a presumption. That is to say: Under conditions of uncertainty, the ECB will simply continue to adhere to the presumption that it will act as LOLR unless the conditions for rule departure manifest. This, in significant part, explains the relatively low and stable borrowing costs enjoyed by Members in the teeth of the significant economic shock created by the global pandemic. The position stands in stark contrast to the aftermath of the credit crunch until Draghi's "whatever it takes" intervention in July 2012. 257 EUR. PARL. DOC. PE 507.482, supra note 231, at 19. 258 See Gauweiler, Case C-62/14 at para. 62.
In light of the experience of the convertibility and parity rules, this moderation is not only less remarkable, but necessary. Those rules serve as a reminder of the importance of monetary policy and the value of macroeconomic flexibility. 259 As noted by O'Rourke and Taylor, calls for adherence to the sum and substance of Articles 123 and 125 of the TFEU naturally collided with the exigencies of the Keynesian short-term time frame during which politics unfold. 260 In an attempt to solve a free-rider problem through legal instruments, the Member States set limits on the commitments made that proved insufficiently flexible during crisis and risked collapsing the entire EMU infrastructure until the scope of commitment was softened.
Finally, as the ECB is an institution with significant technical expertise, the likelihood that it is capable of exercising its limited discretion fruitfully at the point of application is increased. The ECB proved itself increasingly capable of undertaking a pragmatic, efficient analysis of the foreseeable costs and benefits that would flow from the application of the rule-or, in this case, departing from the rule. Through the crafting of clear, transparent, and effective sovereign LOLR rules, the functional constitutional order might be such that the ECB will apply a presumption. From a perspective of narrow rule-adherence, this undermines the rule of law insofar as the exceptions were not introduced in a manner consistent with formal parliamentary assent. Nevertheless, no useful purpose is served by criticizing the ECB for avoiding the collapse of an unsustainable legal regime. Moreover, even if the Eurozone could have survived the strict application of the no sovereign LOLR rule, Kilpatrick has argued-with considerable force-that the manner in which macroeconomic reforms in the periphery Members were agreed to and implemented also troubled the rule of law and was incompatible with the legal values underpinning the EU. 261 Finally, it bears repeating that pursuant to Article 127 of the TFEU, without prejudice to the objective of low and stable inflation, the ECB shall support the general economic policies of the EU, and that contributing to the stability of the financial system is an enumerated objective. Therefore, the ECB may well have little cause to fear the GFCC's call for greater public transparency surrounding the requirement for policies such as OMT, PSPP, and PEPP over and above monetary policy transmission, as each has proven proportionate to, and justified by, the broader objectives set forth in Article 127 of the TFEU. 262 Indeed, if greater transparency in ECB decisionmaking is the cost of establishing the presumption that the ECB will act as sovereign LOLR at times of crisis, then it is a small price to pay for the welfare benefits associated with lower sovereign borrowing costs, increased economic growth, and significantly greater financial stability.

F. Conclusion
At the outset of this article, it was observed that the European integration project has represented a second-order decision by Member States to cooperate to construct markets. Exchange rate markets played the role of distributing, in significant measure, the balance of adjustment between states arising from trade and during periods of economic instability. The Treaty of Maastricht was intended to replace those markets with a monetary rule supported by the SGP, a ban on bailouts, and a prohibition on monetary financing. For ill or for good, it has succeeded in replacing that market with an institution that acts as LOLR to the Members in circumstances that have been introduced ex post.
Without doubt, it would have been preferable for the Members to have made better provision for financial stability in the original treaty framework or proved themselves capable of responding to the inadequacies of the constitutional architecture of the ECB by way of pragmatic political compromise enshrined by way of formal treaty revision. But neither of those failures, nor the decision to soften the no sovereign LOLR rule, represent much by way of a historical anomaly. On the contrary, international monetary rules have a long pedigree as politically expedient compromises that fail to bear their burden. Ad hoc compromises and contentious economic reforms as a sine qua non for liquidity enjoy a long, vexed history. In fact, rules that solve the free-rider problem, yet remain responsive to the exigencies of circumstances, are the historical anomaly.
All of this points to the likelihood that the ECB will continue to house conflict over the distribution of the costs of financial stability. This is so despite the fact that, as an independent central bank at the EU level, the ECB is not subject to the jurisdiction of any national court. The spilling over of that conflict to a dispute between the GFCC and the CJEU provides impetus for reform projects to address the disassociation between the formal and functional constitutional architecture of the EMU. That is to say, if the Bundesbank is torn between its domestic constitutional obligations and those implied by the EU legal order, it risks undermining the Eurozone monetary architecture. The effective transmission of monetary policy and financial stability are dependent, in significant part, upon the credibility of this legal architecture. All Members benefit from a commitment to low and stable inflation-itself contingent on the credibility of the ECB.
Through the clear, credible, and effective articulation of the requirements necessary for rule departure, a more stable and sustainable euro would be constructed. This would require making politically contentious choices ex ante. Yet, such rules would diminish the perceived excessive politicization of the ECB, as it would simply adhere to the rule at the point of application unless and until the clear conditions necessary for rule departure be met.
The alternative is not-and never was-absolute adherence to the literal wording of Articles 123 and 125 of the TFEU come what may; it was always a rule-with-exceptions. Under conditions of uncertainty, the ECB was forced to make choices regarding whether the circumstances required rule adherence or rule departure-meaning whether to create an exception. Those choices were made at the point of application, thereby amplifying their political and legal contentiousness. Therefore, it is not the softening of the rule toward a rule-with-exceptions or the construction of a presumption that threatens the legal order. Rather, it is the paralysis implied by forcing the ECB to make politically and legally contentious choices at the point of application-only to be inevitably reviewed by CJEU and the GFCC-that threatens the sustainability of the euro.