In 1930, John Maynard Keynes predicted that wed be having 15-hour workweeks by the end of the century. But by the time it was 2013, it was clear that the great economist had gotten something wrong.Welcome to the era of bullshit jobs, as anthropologist David Graeber coined it. Since the 1930s, whole new industries have sprung up, which dont necessarily add much value to our lives.