Richest Are Leaving Even the Rich Far Behind - New York Times: "The share of the nation's income earned by those in this uppermost category has more than doubled since 1980, to 7.4 percent in 2002. The share of income earned by the rest of the top 10 percent rose far less, and the share earned by the bottom 90 percent fell.

Next, examine the net worth of American households. The group with homes, investments and other assets worth more than $10 million comprised 338,400 households in 2001, the last year for which data are available. The number has grown more than 400 percent since 1980, after adjusting for inflation, while the total number of households has grown only 27 percent."