If I work my ass off and my model recommends a few extra units, I don't see another dime, so where's the motivation?
I very much doubt my "going the extra mile" will really affect anyone at all in any major way. It may make some made up numbers go up -- or down -- but realistically it will have no major effect on anyone at all, except myself (and negatively).
Whatever effect it elicits in another will be short-lived, and forgotten next quarter -- least of all recompensed sufficiently for the sacrifices made.