Don't know if that's true. The big goal is to avoid federal lawsuits and other scandals. If the can can be kicked down the road for a few more years, fine! Uber only blew up because Susan Fowler was better connected than most, and you'd like to know how much the scandal affected the company. Uber is fine, Kalanick is fine, a few HR drones lost their jobs, business as usual.

Highly paid people are a pain to hire for and replace.

If all of a sudden your turnover spikes that's a lot of sudden unexpected cost, which is very bad.