Why can't you get into heaven if you're just a good person?

I know in the bible it says that in order to enter heaven you have to have faith in jesus and not just through good works...so does that mean that people like Rush Limbaugh and Glenn Beck would go to heaven while good men like Bill Gates and Warren Buffett go to hell?...i mean if someone has a very good heart and gives all they can give will god reach out to them before it's too late?