Thats a very complicated question. There are so many things that go into economic growth or decline that I am not sure your questions can be answered. For example, lets pretend that Bush raised taxes on the upper bracket in 2007 and then we had the crash. Could the huge economic downturn be solely attributed to the tax increases? Knowing what we know today, do you think it would have had ANY impact on our current situation?
However lacking my response to your challenge was, I would like to offer one of my own.
Regardless of what the tax rates/brackets have been, have we been able to tax an average of more than about 18% of GDP from the economy?
What happens when your debt grows faster than your GDP (and therefor your revenue), lets say an average of 2% a year every year, over long periods of time (lets use 60 years, then 80, then 100 and a starting point of debt = 30%GDP)? What is the difference, in percentage of GDP, from year 60 to year 80? 80 to 100?
Historically, even with 70% taxes on the top brackets, have we been able to maintain a revenue of 20% of GDP over any reasonable period of time?
What is the eventual mathematical conclusion?