Fantastic idea ! so you reduce the payments, which will mean stop in recruiting new staff, or paying them so they leave less staff , stop investments and 5 years later you can close the center , but who will take over ?
Ehh well the current system of giving you money WITHOUT any service level guarantee doesn't seem to work well either as DFS was stopping/slowing recruitment to maximize profit while at the same time they are doing all kind of non core stuff like running towers in other countries.....
So actually paying according to service levels does definitely get managements attention!