No, greed (or wanting money) is one of the reasons some people with brains get paid better. if they can think of things or ways of doing things that save money

No, greed (or wanting money) is one of the reasons some people with brains get paid better. if they can think of things or ways of doing things that save money or create value, or both, then they will get paid lots. They could still agree with their employer that they get paid the equivalent of a postgrad stipend, but they probably don't. You don't need to game a system for that to happen.