Proximity to a fat person has no impact on my calorie intake. I'm amazed how many people post arguments like this without being able to shift to a third person observer perspective.
It seems that the incurred costs per capita for overweight/obese people is somewhere from $250-$2000 according to this study. [1] So we can use some combination of the carrot (reward people who are healthy) and the stick (tax/penalize people who aren't) and end up more or less in the same place.
> "We haven't developed the data yet to say that it's clearly dangerous, but it probably is," says Dr. Hays.
[1]: https://newsnetwork.mayoclinic.org/discussion/mayo-clinic-mi...