Have you considered that the household income in the United States is higher in general than the countries in Europe you are comparing physician salaries to? Salaries are higher here across nearly every profession. Do you think physicians should be the exception?
Now take into account how much harder we work and how much more educated and trained we are as others have said.
Now take into account how we provide more timely and advanced healthcare procedures. You are overlooking the differences between the US and many European healthcare systems. Our system is at will and therefore, naturally, it is problem/solution based instead of prevention based. Many socialized systems are prevention based and force participation through checkups, etc. Such is the difference between freedom, and government dependence. As Americans, it is each individuals responsibility to take care of themselves with or without the help of the physician. Therefore, some people have great outcomes, others do not.
Now consider how the "outcomes" you brought up are based on population statistics which don't take into account any differences in the healthcare systems, diversity of communities, sheer size of country, etc.
You talk about the cost of the healthcare system. What is cost? Socialized European countries budget X amount of money for their citizen's healthcare. That is their cost. We are not socialized, therefore, our cost rises and falls dynamically with citizens, businesses, insurance companies, providers AND the government contributing.
Now that I've dismantled your hysterical claims with facts you conveniently overlooked due to your political blinders, my work here is done.