It's not like the firing is random. "Low performers" get a lot of warnings throughout the year. Most people are average or above so they will be completely unaffected, it's not likely you would drop from 50th percentile to 5th.
On the other hand, do you really want to be stuck working with someone who's not very competent? I think we've all had that experience and it's miserable.
On the other hand, do you really want to be stuck working with someone who's not very competent? I think we've all had that experience and it's miserable.