The salient question, obviously, is “how much money did the government collect at the 91% tax rate”? I’m sure the answer is “not much”. Back in the 1920′, Andrew Mellon demonstrated clearly that if you cut tax rates on the wealthy you get economic growth, and they PAY MORE, both in absolute dollars and in terms of a percentage of the whole.
Yes, this is because they are getting richer, but SO IS EVERYBODY ELSE. We would not have had a crash if the Fed had not pursued inflationary then deflationary policy, and we would not have had a Depression if first Hoover and then FDR had not tried to engage in social engineering.
Leftists love punishing the rich so much that they are willing to suffer generalized poverty to do it. This is a moral malignancy.