You're mistaken in that you believe that the goal of culls is to cut underperformers. Stack ranking doesn't assess performance, it checks whether you're willing to do a little more to be ahead of your peers.
The real goal of culls is to motivate people to work more, to be more accessible to their managers' requests, etc. so they make it "to the next round". It's a pressure tool, not a performance control tool.
The real goal of culls is to motivate people to work more, to be more accessible to their managers' requests, etc. so they make it "to the next round". It's a pressure tool, not a performance control tool.