Lemme guess -- You are perfect in every way.
Perfect? How did you know?
But, what does that have to do with people paying for their decision to become overweight and thereby making knee and hip replacement (costly) only a temporary measure if they don’t take care of the cause (usually), or at least a hindrance to their healing: LOSING WEIGHT
Is there some reason that you can see the need for self reliance in some financial/ esoteric sense, but when a person chooses to live a lifestyle that leads to illness all the rest of the country should pay for his interventions?