Doctors - helping the needy, or money? Which should I pick?

Doctors as well as dentists and other professionals in the medical field take an oath where they help people in need. They're there to provide a service to those with health issues whether they have money or not. They're in the business to save lives, just like law enforcement and fire fighters. So why then would someone who is experiencing a great deal of pain due to an infection that could worsen without proper attention and has no insurance because they're still a new employee or they only work part time, must they suffer because they can't pay $100 to $300 for medical attention and medication? What in blazers has this god-forsaken country come to? Michael Moore's film Sicko focuses on how screwed up the system is. I hate to say it, but if you have no money, you can pretty much say you'll have sucky health. So how then are we so over populated? I know the rich don't exactly outnumber the poor...