This song is about the type of girl that he likes. He is saying that the fact that she is not helpless or stuck up like other girls makes him want her. He likes the fact that she doesn't have to depend on a guy she can take care of herself!
Like me!
I believe that even if you are not rich everlasting every woman must have some means of supporting herself to save for the day (if it should come) when her man decides "I've had enough". If you have this means for yourself then you don't even have to slow down to drop his off. You can just shift your car into gear and drive off into the sunset.