For
It can improve productivity and well-being.
Against
It may reduce output and harm client service.
Anonymous excerpts, translated where noted.
“Most of my coworkers feel way more productive by Thursday and totally drained by Friday.”
“It’s patently obvious that a shorter work week would improve the life of workers.”
“I don't think employees would want it either when they realize it would result in pay cuts”
“It likely heavily depends on industry”