The competitive insentive is why social pressure not to work is important. It's a basic zero sum game: If you work more, I also have to work more, and the compe

The competitive insentive is why social pressure not to work is important. It's a basic zero sum game: If you work more, I also have to work more, and the competitive advantage evens out. If we can collectively decide (and enforce) not working weekends, we all benefit.