it could also be argued that people are fatter in this country because preventative medicine is seldom practiced. If we all had health care and regularly visited our doctor who told us "hey fatty, youre getting fatter, and youll be diabetic soon if you dont start doing x, y and z." Then maybe we would be less fat (or catch cancer sooner, or whatever) and therefore our health care would rank higher.

So while it may be a "chicken or the egg" thing, I think it makes the most sense that we will have a more healthy country when more people have healthcare, thereby making our health care system run smoother.