And just how do you think they got to make better money in the first place?
Nothing but a better career in some cases, self discipline in other cases...sometimes a combo of the 2.
"And just how do you think they got to make better money in the first place?"
Absolutely incorrect. If your professional discipline has nothing to do with finance, then what bearing does your personal financial management have on what someone will pay you? I could be the best dentist, or plumber in town, but be terrible with finances. Would you pass over the best dentist for someone not quite as good who had his personal financial house in order?