Amazing. I've always wondered why anyone making less than $250K a year would vote Republican.
Well...here's a stab at an answer. Check out this post at Neatorama. The original article is at The Economist.
Basically the PEW research suggests that people do not want to be at the bottom of the ladder. They feel that helping people who have less than they do to have more, and thus have more than they do, and thus be above them, is not something they want.
Note: they also address the idea that people hope they will be rich someday and that's why they don't want to tax the rich-because they see it as against their future interest. But here we're talking about people who will NEVER be rich.
Well, it's the best explanation I've ever read.