I never understood how people can manage working forty hour weeks for forty or fifty years of their lives. Even when I was working 50 or 60 hour weeks to make ends meet I knew that something had to give.
I now have the privilege and option so I recently cut my own working hours to 32 per week and it's a big improvement. I'd go even further but I can't accept the additional loss of wages, especially since there isn't a proportional reduction in work responsibilities.
I'm absolutely convinced that twenty hour work weeks are more than sufficient to keep society moving forward and people taken care of. Another interesting idea is to have everyone take year long paid sabbaticals every five years or so to give everyone a chance to enjoy the best years of their lives and learn for themselves who they are and want to be.
Even in a capitalist context less working hours gives benefits in productivity and worker satisfaction. People with more time and resources to spend on what they appreciate in life makes them better workers too. Maybe it's a little too conspiratorial from my side, but it looks as though forty hour work weeks and as little possible paid time off are kept as standard because it's easier to control a populace which is kept busy and exhausted. If we all had extra time and brainpower we'd revolt against wage labour and private ownership of our production pretty quick.