As sort of a second topic to this data, consider why Reaganomics appears to have worked so well. Reagan changed a 70% tax bracket to a 50% tax bracket. That was a HUGE amount of money freed up. He also had the benefit of capital gains rates dropping from 28% to 20%.

Contrast that to Bush who cut a a 40% rate to 36%, but the capital gains rates were also at historical lows to begin with -- 15%. So bush's tax cuts for the wealthy didn't really free up much capital and arguably starved the government of important revenue. I'm not aware of anyone showing that Reaganomics worked for bush's tax cuts.

http://en.wikipedia.org/wiki/Capital..._United_States