To use your example of someone working on the plumbing of an accounts payable system, who is passionate about that? The supply is near zero. That, like most jobs, is going to need to be done entirely by people who are just doing it for the money, and there is nothing wrong with that.

Your example runs counter to the laws of supply and demand too. You understand that wages will rise when supply is restricted, but you don't want to accept that supply will respond to the price signal in the form of more people entering that job market.