[danaris]

In addition to what other people are saying about productivity not being linear:

Screw productivity.

We, as a society, produce vastly more than enough stuff of all kinds for everyone to live comfortably. Insisting that everyone must continue working a 40-hour week every week forever just because that's the best that could be negotiated the first time workers successfully fought for their rights after the Industrial Revolution is foolishness.

Total productivity has skyrocketed since computers came on the scene and helped to streamline millions of different processes. And where have those gains gone? Eaten up by the very wealthy.

A 4-day work week is one very small step toward letting us, the regular workers who actually produce all the stuff, genuinely share in the spoils that streamlining created.