My company has about 4K employees. My team? 20. As best as I can tell, we have two stellar employees, two terrible, and 16 who are all basically the same. How t

My company has about 4K employees. My team? 20. As best as I can tell, we have two stellar employees, two terrible, and 16 who are all basically the same. How these 16 are ranked is based on how well they get along with their boss, the PM that manages the projects they're assigned to, and the managers of other teams that they periodically interact with. Yet somehow, management/HR can classify these 16 with enough certainty to decide that 8 deserve good compensation/promotions, and the other 8 should be PIP'd? In some teams I work with, every single employee is what I consider an 8 through 10. Yet the 8's should be RIF'd/PIP'd? Evaluating and compensating employees is tough enough without using voodoo like Stack Ranking.