I think that if we are going to have a public option, it only makes sense to tax the hell out of products and lifestyles that lead to or directly increase the chances of disease - tobacco products, alcohol, fatty foods, refined sugars, fast foods, motorcycles, tax via the amt of miles you commute each year, tax based on BMI - that sort of thing.
Give tax credits to people with healthy BMIs, who exercise regularly, etc.
Hey, I know it sounds crazy but actually I think it's a very consistent concept. Not that it will ever fly. It makes WAY too much sense and (gasp) it might OFFEND someone.
You really want to base it on the BMI? Okay, let's do that. I'm not even going to go into how the BMI is junk science, I'm just going to roll with it.
People who are considered overweight or mildly obese by the BMI have a lower death rate than people with a normal BMI. Yes, fat people live longer than thin people. (This isn't taking into account severely underweight or morbidly obese peoples- they have an increased chance of death.)
People who are "fat" are better protected from and more likely to survive infections, heart and lung disease, rheumatoid arthritis, cancer, anemia, high blood pressure, osteoporosis, and type 2 diabetes. Yes, even the DIABETUS. Hello, obesity paradox!
There's no proof overweight people exercise less and eat more than thin people. Check out
this book for more information on that.
Yes, eating bad food and living a sedentary lifestyle is bad for people of
all sizes and shapes but you can not tell what someone is eating or doing by just looking at them.
You said people might find your idea offensive. It's offensive because it's completely untrue and no, there's not a lot of sense in it.