legal slave labor in the US

"Goodwill Industries, a multibillion-dollar company whose executives make six-figure salaries, is among the nonprofit groups permitted to pay thousands of disabled workers far less than minimum wage because of a federal law known as Section 14 (c). Labor Department records show that some Goodwill workers in Pennsylvania earned wages as low as 22, 38 and 41 cents per hour in 2011." (thanks Amir)