Research on the relationship between inequality and political engagement has yielded varying conclusions. Some studies suggest that inequality fosters political action, while others indicate the opposite, and some find no significant connections. This study demonstrates that individuals’ reactions to inequality are influenced by their attribution of the causes of low income. Based on a survey of over 3,700 residents in Hong Kong, a region known for its high levels of inequality, this research finds that blame attribution significantly affects intentions to participate in collective action. Individuals often attribute income inequality to three types of factors: structural, fatalistic, and individualistic. Those who attribute inequality to structural factors are more likely to engage in collective and disruptive actions, whereas those who attribute it to personal factors are less likely to participate. Consequently, reducing inequality can contribute to social stability by decreasing the potential for collective action.