In a wage bargaining model, a stronger earnings relationship of unemployment benefits may reduce wages. Therefore, the benefit structure significantly influences profits and trade union utility, raising the question as to how the benefit structure is determined in the political process. We consider a government that chooses the earnings relationship in order to maximize its political support. Our model predicts a strong earnings relationship under right-wing governments and a weak relationship when unions are influential. Using panel data for 19 OECD countries, we find support for these theoretical predictions. Moreover, we show that the earnings relationship varies negatively with openness.