Says who? If you want to work 40 hours a week, have your weekends off, and relax more, that's great. You are optimizing for more time off than me as you value it more than I do; cool. However, if I want to work more than 40 hours a week and my total output ends up being higher than yours then I should absolutely be rewarded by my company for it. All things being equal, I should promote faster; I should get better raises; etc. You are optimizing for one thing, I am optimizing for another, and that should be fine.