Good thinking. Maybe we should take all the people who are at risk for disease and put them in camps somewhere where they can't pollute the gene pool.

And only in a country where all citizens are in it together is there any kind of motivation to have public preventative / anti-obesity / social medicine efforts (assuming that's what you're implying here). Preventative medicine is the number one way to save money with healthcare, but most health care plans won't even help members with smoking cessation programs, because they're most likely going to be on someone else's plan when they come down with emphysema or cancer.