From what I’ve seen it’s almost always as you describe or something political like a manager taking over a group and wanting to make room for their friends. But if employees are burning out and then being PIPed instead of getting support I think that is a rather sad indictment of our industry in an of itself.
>if employees are burning out and then being PIPed instead of getting support I think that is a rather sad indictment of our industry in an of itself
The thing is most big companies don't care about your burn-out or personal situation, they either have product launch deadlines to meet, or revenue targets or customers to please, and people in the trenches are considered replaceable so churn is something they account for in order to meet those commitments.
If you're lucky you might have an understanding manager, but he himself may have targets to reach for his bonus or promotion, and if you're dragging his team down and his bonus promotion with it, then ... it's nothing personal, it's just business, you will be let go.
I worked for a major European semi company and the churn there is insane, either they fire people or people leave by themselves within the first 2 years. All because managers are given near impossible targets, along with great bonuses and stock packages to incentivize them to use whatever means necessary to deliver on those targets, usually at the expense of people in the trenches which are treated as expendable commodities.
Your manager might also have a specific target for “unregretted attrition”, i.e. getting rid of people using the PIP process. If there is not a clear person who is the weakest link, then the manager will pick their least favorite. And remember, performance is very subjective.
I have seen a couple of people get fired for cause; that was always clear. I’ve never seen an unambiguous PIP.