This is massively flawed thinking. So called "market rate" is actually a tool for value extraction from the workers and is not connected in any shape or form with what they create for company they work at. As corporations refer to this as if it was a consensus (as in developer should earn $x an hour), they pay this much and workers have no choice but to accept (if someone has working class background and no trust fund, it is rather impossible to throw the towel and start own business, sometimes there are even regulations designed to keep workers captive).
In such a project, "founder level" people should pay themselves as much as they think their worth is. Simple as that.
I often hear VC talking that if founder takes too much money, it's a bad look. They just want to shame people into not taking the slice they deserve.
It's interesting that IT is full of intelligent people, yet they can't grasp how they are being played by the market frames set by the rich.