Other slides show the stagnation in the average hourly wage, the huge increases in income for the top 10%, the decline in the share of income for the bottom 90%, the relationship of income to changes in tax rates, and comparisons to the wealth gap in other countries. See the slides: "15 Mind Blowing Facts about Wealth and Inequality in America."
In a recent article, Roberrt Reich points out that the wealthy used to fund the government by paying taxes. In the last 30 years, the wealthy funded the government through loans. Just like foreign governments that buy U.S. bonds, the wealthy will stop buying them if deficits become too large and they fear the U.S. government might default on the loans. See Reich's article, "The Great Switch by the Super Rich."