My only reaction is the idea that each child should be raised according to their way, etc., and parents have the ultimate role in deciding what is fit. This is working to condition the child in a positive way.
Tangible rewards are a valid step in modifying behavior.
In the adult work, say, in sales, etc., people motivated to earn higher commissions can do so in and up and up way, and in that case, they are never weaned off of that system, as eventually, I am guessing, the point system will not always be employed for this boy.