Not a good day for statistics
The top 1% in America controlled, in 2001, 33.4% of the wealth, continuing a long-term trend toward concentration of wealth at the top. Interesting how the percentage of taxes paid matches pretty closely the percentage of wealth owned. Even though taxes are paid mostly on income, other studies show an absolute correlation between income and ability to accumulate wealth (almost a "duh").
So, why should I think that the rich are paying too much in taxes? Looks about right to me.