In this week's issue of the magazine, the Money Issue, pianist Jeremy Denk revisits a kitschy musician-for-hire gig from early in his career. Denk was just awarded a fellowship by the MacArthur Foundation, and he's on tour now to promote his latest album, "J. S. Bach: Goldberg Variations." He spoke with Leo Carey and Sasha Weiss about the challenges of playing music that everybody knows, what he loves about the Goldberg Variations, and how writing fits into his musical career. Also on the podcast, one man's personal debt ceiling.