Because if we did we’d have universal healthcare, 4 day work weeks, WFH where possible, walkable cities, and a lot more housing, and every single one of those things makes it harder for abusive jobs to control their employees.

Naive question but if it works best wouldn't companies that have a four day work week outperform theirs peers and because of that grow faster, and become more common?

I see the opposite in most startups that have a 6 day work week to get ahead of the "slowly moving" 5 day work week competition.

"study"... The replication crises in science has shown that most studies are total bs. So we probably don't want to go with them.

By inductive logic, a zero day week works best.