Under such a system five years ago, my manager told me that it was "my turn" to "take one for the team" and be the 2, promising that it would be at least three more years before my turn came up again and that I was not really a 2. When I gave my notice, he was shocked that I didn't respect the way he stood up for the team with his fair system [and that I could have found time to interview elsewhere with my overloaded workload!]:-P