JM Keynes said eons ago that with increases in efficiency we will eventually be able to get to a 15-hour work week. So, a particular industry in a particular area was able to get to an approximation of that, and the counter-argument is that this is not a productive use of capital?
Besides, TFA complains that all these people are working on silly startups, which is presumably not a productive use of capital either. You can't have it both ways.