I have heard that the most talented people tried to ensure they weren't working on the same team with other talented people, just to ensure they would continue to be highly ranked.
I can see how stack ranking would be disruptive, but often times disruption can be good thing. It actually makes sense to disperse a cluster of talented people who just delivered a successful project so that they move on to become team leaders on new projects with less experienced members.
"Do not seek to follow in the footsteps of the wise. Instead, seek what they sought." - Matsuo Basho