The base assumption of measureable performance is wrong. What if somebody sat all day in the office doing nothing, just talking with one of the best performers

The base assumption of measureable performance is wrong. What if somebody sat all day in the office doing nothing, just talking with one of the best performers once in a while. S/he is nothing but a drag on the team, on the papers, but in reality s/he might be the brains of the operations, with a "high-performer" as company front. Abstract that away and you can see HR gunning out everyone but sales. Sales can do nothing without a good product, except sell themselves extremely well. My personal base assumption is that HR, with the 10 % rule without external oversight destroys more valua then it creates. The powerplays alone are enough to wreak havoc.