On: Germany tests 4-day workweek amid labor shortage

[whstl]

Yes. Heavily.

Even in cases such as manual work it doesn’t have a directly proportional correlation, since people get tired.

[rascul → whstl]

Yes people get tired but I don't see that significantly affecting the amount of work done in general, for 8-9 hour work days. Do you?

[whstl → rascul]

Yes, definitely. It also heavily affects the quality.