...But, as David Solomon, the global co-head of investment banking at Goldman, told me, “Today, technology means that we’re all available 24/7. And, because everyone demands instant gratification and instant connectivity, there are no boundaries, no breaks.”

Cry me a river, you might say. But what happened on Wall Street is just an extreme version of what’s happened to so-called knowledge workers in general. Thirty years ago, the best-paid workers in the U.S. were much less likely to work long days than low-paid workers were. By 2006, the best paid were twice as likely to work long hours as the poorly paid, and the trend seems to be accelerating.

...The perplexing thing about the cult of overwork is that, as we’ve known for a while, long hours diminish both productivity and quality.