You should blame them. Some people do flourish with five days a week, some don't. Which is why it is great to have this as an option. I work four days, 32 hour

You should blame them. Some people do flourish with five days a week, some don't. Which is why it is great to have this as an option. I work four days, 32 hours, and I need that extra day off. Work is mostly out of my head when I stop on Thursday until I start again on Monday. I have a child to raise, a house to maintain, hobbies to pursue, and a partner with the same needs and, crucially, a job as well (also at 32 hours a week). My company wouldn't have it any other way either. There is no benefit in forcing everyone to work five days beyond a small availability benefit. Happy workers are good workers.