Total bullish*t.
The top rates were higher in the past, but the income brackets were set so high that there were very few paying them.
Today there are far more people paying much greater percentage of their income than during the years of 'higher tax rates' the liberals love to cite.
A great chart would be to graph the total tax bill paid by Americans as a percentage of income. All taxes and government fees including what is paid through backdoor ways.
Graph that back 150 years or so.
And don't forget that there used to be all sorts of tax deductions which have been eliminated. For instance, you used to be able to deduct credit card and loan interest rates (other than mortgage interest).
Mark