The four day work week under consideration in New Zealand. Why not here?

[Johnny2X2X]

23. It's been know for decades

Anything over 40 hours hurts the worker and the employer. It's bad for business. That is a known fact.

Less clear, but also suggested is that 40 hours is too much still. There's enough evidence out there that 35 hours should be the standard work week. It's just hard to change people from their norms. And the fact that there is the odd person here or there that is super productive for 50 or 60 hours a week.

There is clear scientific evidence, so much so that that there is no doubt that a maximum of 8 hours a day should be adhered to, and a straight 8 is best, working 8-1/2 hours with an unpaid half hour lunch is harmful, it's better a straight 8 with a half hour paid lunch. These are known facts, we've known them for a long time. And yet managers all over continue to hurt their company by forcing people to work too long for the company's good.

https://www.askspoke.com/blog/hr/40-hour-work-week/