Umm, I know plumbers that make way more than doctors. They have corporations, employees, provide benefits etc. much like a doctor, but they set their own rates. And garbage collectors go on strike, and have public funded pension plans, which doctors do not.

The reason most doctors are pissed, is the fact that they were told that they could not change what they charged for their services, the government tells them what they can charge. In return for this, the government told them all to incorporate so they could save a bit more for retirement as a tradeoff for not being able to charge much for their services.

Dentists got a better deal, they are allowed to increase their rates by up to 3% per year, and incorporate. That is where the real money has been made for quite some time now.