It's also...if they have the ability to recognize and protect their high performers - why "turn up the heat" in general? You've already identified who isn't per

It's also...if they have the ability to recognize and protect their high performers - why "turn up the heat" in general? You've already identified who isn't performing. Conversely, if you can't avoid harassing your highest performers - those seem like the people who will leave first, while the people who are under-performing will dig in to avoid risking the job market.