According to the Internal Revenue Service, in 2008, those in the top 1 percent of the income distribution, with incomes over $380,000, had an effective tax rate of 23.3 percent. In 1986, a year when the real gross domestic product grew a healthy 3.5 percent, their effective tax rate was 33.1 percent. It has been much lower every year since.

If this group were still paying 33.1 percent, federal revenue would have been more than $166 billion higher in 2008 alone. That would be enough to reduce the budget deficit by about 10 percent this year. If the top 1 percent of taxpayers had continued to pay the same effective tax rate they paid in 1986 every year from 1987 to 2008, the federal debt today would be $1.7 trillion lower.