I knew a guy who was not exactly anti-tax, but he believed that poor people should be taxed more heavily than the rich ones, the moral justification being that

I knew a guy who was not exactly anti-tax, but he believed that poor people should be taxed more heavily than the rich ones, the moral justification being that that would motivate the poor to try harder to be rich; plus, of course, there are more poor people, and taxing them would likely yield more money than taxing the rich, not to mention that much of the taxes go to the social programs to support the poor, so it's only fair if they paid for those themselves.