I think the only flaw is:
... if the entity wants to act in an optimal manner.
I'm not convinced any curve will dissuade an entity that doesn't want to act in an optimal manner. And I'm not convinced that the people we're talking about adhere to the description of "optimal."
Meaning, there are plenty of people who will act out no matter what the curve is. I was happy with whatever curve was in play. I'm happy with the current "curve." I'll be happy with whatever replaces it now. I do not see the curve as a magic bullet to get bad actors in line.