Ok, I wasn’t considering a rotation where the workplace would be partially staffed Mondays and Fridays. That makes a lot of sense. I was imagining everyone having off Saturday-Mondthatn a more universal weekend, which I think would not be practical for getting things accomplished. In that case I see what you mean about Mondays.
I forgot to add a /s after that sentence. I know teachers are severely understaffed and underfunded. This 4 day workweek seems like it would be wonderful with the exception of the people deemed too vital not to work. Just like during covid, some people will have a better time being paid to stay home, and others will have to continue working for the same pay. The burden would certainly fall on teachers, doctors, nurses, construction workers, maintenance personnel, and any other job that has a short supply of workers and high demand. Before switching to this system, our society would need to consider how to handle this problem.