Almost all of the programs that FDR expanded were begun by Hoover. Dano has posted several times the quote of FDR's chief of staff not only admitting it, but stating that most people simply didn't realize this fact.HAHA. Hoover both raised taxes and cut spending. He had little other choice to keep the government afloat without going into massive debt. The treasury basically forced this on them - deflation went to double digits in the 30's and they still held onto a tight monetary policy. The economy shrunk to such a massive state that the government could barely keep anything up even with massive taxes and huge cuts.
Of course, our treasury is wiser now, so we aren't headed to a great depression, but we still need to spend because we're in a deflationary trap that not even the fed can fix. And raising taxes on the rich just lets us lower taxes on the people who deserve tax cuts even more.
I find the Great Depression interesting, and amazingly valid at this point in time.
Taxing the "highest earners" at a higher level would not be beneficial to us at this time, and it will never be beneficial to take from them so heavily that it reduces incentive to succeed.