Via Balloon Juice, here's a chart of the tax rate on the top bracket over the years. The first thing that jumps out at you is that we taxed the ever-living crap out of the rich back in the day. The top tax rate was an astounding 90% up until 1964. Think about that. That prosperous, leave-it-to beaver world of the 1950's was built on taking all the money from the rich folks.
I'm done hearing about conservative whining about going back to the 1990's top tax rate of just under 40%. Shut up, or we will go Dwight D. Eisenhower on your ass.