That seems more relevant than it is. The US tax code used to be riddled with loopholes - nobody actually paid the top rates.
The effective tax rates back then were still higher than today. You're right, they weren't 92%, but they were higher.
I wonder if that's actually true. It was far, far easier to hide income back then. This is before currency transaction reporting and "currency smuggling" laws. You could get on a flight to Zurich with a duffel bag full of cash and it wasn't something anyone had to report to the government.
used to be?
Yes. Prior to 1986 it seemed like everyone you knew had a money-losing chinchilla farm or something they could write off. If you tried to do that today the IRS would laugh at you.
As opposed to the present, when there are no tax loopholes.
http://www.businessinsider.com/history-of-tax-rates-2012-5
http://s158.photobucket.com/user/OnlyObvious/media/Tax_Rates...