You can critique Amazon for basically saying "don't worry about it" so managers may invent plans like hire-to-fire to game the system and overall someone's gonna get screwed on that team, but it's a tough problem to solve - otherwise, what's to stop managers from all simply claiming "no, my team's a special case"? Introduce special cases and it'll just be gamed through that mechanism.
I'm a firm believer that if you want to avoid things like that you have to avoid large organizations. A large organization is highly incentivized to be bureaucratic so to minimize the effects of unexpected losses and to keep the money machine running.
You lost me. Why should we want to stop managers from saying that?
1. Amazon isn't so special that even they can control the distribution curve to only have rockstars,
2. This is too big for a single team in the first place, let alone 10 rockstars,
3. You don't want any rockstars, let alone only rockstars on your teams,
4. Managing low performers is a magnitude more work than solid performers; no manager would do this to themselves on purpose. It would be easier to cut their 2 least rockin' stars.
And other people say rockstars and mean ‘assholes that churn out new features really fast with incomprehensible code and then leave others to maintain their monstrosity as they move on to the next thing”.
I assume Amazon is large enough to have a team somewhere with 6-10 of the ‘good’ version, and also a team somewhere with 6-10 of the assholes.
Then what do you do a year (and a half for Amazon) later for the next cycle?
One of the many problems with stack rank cull N% of your employees every year is that "every year" part. At whatever level it's mindlessly applied, if the company wants to keep it at the same head count you by definition have a steady churn of hires, which I'll grant you won't always be good, and fires.
This manager obviously doesn't want to hurt this awesome team or lose any members, but Amazon wants them to churn out the bad engineers (which this team may not have).
So instead of finding faults where they don't exist, our manager hires 2 engineers with little to no chance of working out in the team long term, give them some busy work, puts them on a PIP, then eventually fires them, only to soon replace them with two new victims.
It sucks to be a victim, and it sucks to knowingly do that as the manager, but it does work out great for the team and the manager - so I think it could happen (maybe not super common, but it isn't unrealistic in my mind).