Well, this proposal is not messing with anything nor a proposal "instead of doing this or that...". The players salary would still be strictly linked to their skill (maybe to skill and duration of the stint with the current team, but still a very obvious connection), and this proposal is not excluding any other change, so I don´t exactly see any reason against this kind of a change so far.
On a positive note, doing that kind of a change enables you to "view" a buzzerbeater-inside estimation of the salary (for better planning).
Zwei Dinge sind unendlich, die Dummheit und das All...