Why Are There So Many Pointless Jobs?

In 1930, John Maynard Keynes predicted that, by the end of the century, technology would have become so far advanced that developed economies would have a 15-hour workweek. So how did we get to our current state, almost two decades into the 21st century? It turns out that Keynes was only half right—technology has advanced spectacularly, but we are far from a 15-hour workweek.