Even in countries with privatized healthcare (do those exist? maybe) those bariatric needs cost everyone more (unless insurance companies & hospitals were to stop covering fat patients.)  Some people might argue that higher deductibles for fatties would fix this. But really, with the cost of care for obeasts, there is no way 99% of fatties would be able to actually pay their costs. Alright, I'm totally making up these numbers. My point is that insurance is, by nature, pooled risk. Fatties' healthcare costs DO affect you.