I previously had a colleague reduce days in exchange for a pay cut, it was clearly messaged to us (a small startup) that there was a tradeoff happening, and the

I previously had a colleague reduce days in exchange for a pay cut, it was clearly messaged to us (a small startup) that there was a tradeoff happening, and the rest of us were happy to make more money working 5 days/week. I think the human nature part is wanting to be treated fairly -- it's unfair if you get paid the same and work less, but it feels fair if you make more money for working more.