Since these systems all attempt to extrapolate future performance based on past experience, they are almost by definition an affront to free will. The problem

Since these systems all attempt to extrapolate future performance based on past experience, they are almost by definition an affront to free will. The problem is that when something as important as someone's livelihood depends on factors outside their control (like someone else's subjective impression of their performance) then it opens the system up to corruption/gaming/extortion. It's probably valid to keep a log of someone's employee history. But it must be under that person's control and they must have avenues for disputing its contents or expunging it in its entirety (similar to a bankruptcy). If we go down this road, then it must be balanced by employer ratings such as payment followthrough.