I went through a big back and forth with a small startup where I initially negotiated in at 3 days a week. Eventually they said "we really need you the full 5 days" and I explained that I'm gonna do the same amount of work regardless and they could pay me 40% less by agreeing to 3 days. they still wanted me 5 days, so I took the job and just coasted those 2 days from home, they were still very happy with my performance, I ended up quitting in 6 months because I wanted my hours in the day back.

I really think management still doesn't get it.