Wealth provides a cushion against financial risk. We argue that wealth-based insurance can therefore alter status quo support beyond what a simple cost-benefit calculation would suggest. We test our theory in the case of Brexit, which has been widely characterized as a vote by economically left-behind voters. Our results show that individuals who preferred Brexit -- but who also lacked individual wealth -- are less likely to support leaving the EU. We corroborate our theory using two large independent surveys with similar wealth measures, accounting for unobserved individual level heterogeneity, and using a survey experiment. The findings have important implications for the role of wealth-as-insurance in electoral behavior, as well as for understanding the Brexit case.