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Now Playing: 11-27-12 Marketplace

Kai Ryssdal talks to business magnate and investor Warren Buffett about who should be the next Treasury Secretary, how much the wealthy ought to pay in taxes, and whether he's worried about the future of democratic capitalism. Florida’s governor has issued a challenge to colleges to offer a $10,000 degree. The packaged food giant ConAgra is now the largest private label food manufacturer after acquiring Ralcorp. With Powerball jackpot now at a record high of $500 million, thousands of people are willing to pay the new, higher price of a ticket for a chance to strike it rich. And in part two of our series on Walmart and labor, Mitchell Hartman takes a look at whether 'permatemping' in warehouses is designed to keep costs and prices low at Walmart and other big-box retailers.