Good grief. First, marginal tax rates are taxed on marginal income, not gross income. The $250K bracket only kicks in for dollars earned over $250K. Second...

Good grief. First, marginal tax rates are taxed on marginal income, not gross income. The $250K bracket only kicks in for dollars earned over $250K. Second... there are, in fact, points on the income ladder with a marginal rate that is greater than 100%. But they're not a problem for the rich. They're a problem for the poor. At certain points, the removal of things like food stamps and tax credits can result in a marginal tax rate of greater than 100%, which is to say, you are literally better off making less gross income, because you will have more spending power.