Inequality in America. It's a subject that's getting more attention in light of the weak economy and the ongoing debate around budget cuts and raising revenues. Billionaire businessman ... Warren Buffett, who has argued in favor of higher taxes on the wealthiest, [discusses] the growing disparity. WARREN BUFFETT: It should be a land of opportunity. But the ... market system has led to extremes. Everybody in this country owes their good fortune in some way to the rest of the country. DAN ARIELY: People don't understand how much wealth the top 20 percent have. They actually have 84 percent of the wealth. And more disturbingly, people don't understand how little wealth the bottom of the distribution have. The bottom 40 percent of the U.S. have about 0.3 percent of the wealth, basically zero. RICHARD FREEMAN: In the last 30 years or so, the share of national [income] -- of income that has gone to the upper 0.1 percent -- not to the upper 1.0 percent -- 0.1 percent -- rose by 10 percentage points. That is one of the most astounding patterns I have ever seen in data. People sometimes say, oh, the rich, it's the upper 10 percent, it's the upper 5 percent. No, no, this is the 0.1 percent. Warren Buffett has this wonderful statement where he says: Yes, there's been a class war in the United States. And my class, namely the super rich people, have won.