A company so toxic as to have a 10% attrition commitment is going to be filled with employees trying to abuse the company as much as the company abuses them.
I remember (but can't seem to dig up) some research that those programs harm the productivity/morale of the top performers as well, who end up being unreasonably worried that they might end up in the bottom 10% somehow. Either they underestimate their own skills, or worry that a bad review process will undervalue them, so they end up spending a lot of time/stress worrying about reverse-engineering how the review works and optimizing for its metrics, rather than focusing on their real job.
