I don’t understand this argument. Obesity is one of the leading causes of death in the US and one of the biggest comorbidities even with Covid, for example. It’s entirely preventable in nearly all cases. Should we tax obese people more? What about old people who use up the majority of resources? Parents who knowingly give birth to children likely to have genetic diseases?

Do you really, really want to start taxing people and dictating behavior based on their medical expense?