Look what ge did to Devo (http://vermontreview.tripod.com/Interviews/devo.htm)

Vermont Review: Did you produce the South Park Chef Aid album or did you contribute a song?

Jerry Casale: We contributed a song. The process was not much funny for us. This guy Rick Rubin, who has a big name and reputation, but what a terror. He took producer credit and he didn’t produce it………we did. We said, "What are you doing?" He said: " I am Rick Rubin. I am American Records. I am keeping this money." It never stops in the music business. We are still chasing tens of thousands of dollars were owed from Rugrats (The Movie) and South Park (Chef Aid Album). They find so many ways to abscond with your money.