Our sharpest and most original social critic goes “undercover” as an unskilled worker to reveal the dark side of American prosperity. Millions of Americans work full time, year round, for poverty-level wages. In 1998, Barbara Ehrenreich decided to join them. She was inspired in part by the rhetoric surrounding welfare reform, which promised that a job — any job — can be the ticket to a better life. But how does anyone survive, let alone prosper, on minimum wage.