One can see fairly easily that the crash of the stock market in 1929-30 and its tax rates and those of the 2007-2008 recession era tax rates are nearly the same. Interpreting data is difficult for some to do accurately of course. Some quants have a good sense of computer progreamming and math formulae about that sort of thing-while others crash.
Abraham Lincoln began the income tax to pay for the civil war of course. President Bush II just charged the war and cut taxes and what a fine mess we have today. The quant-math global e-market algorithm traders view corporations and Americans as abstract quantities for sale or downgrading. In fact the entire nation requires an F.D.R. quality rectification of capitalism through new regulation-yet it won't happen probably. Dumber and Dumber is the way it goes today.