>>13427233As the US is entirely fucked by having 50 decentralized governments, do whatever constitutionally possible at the federal level.
Implement a sugar tax proportional to the health consequences on refined sugars and high fructose corn syrup, similar to a theoretical carbon tax that taxes the externalities of pollution. In conjunction with this implementation, remove subsidies on corn produced for direct human consumption and subsidize sugar free drinks instead. Health insurance is federally mandated to consider the BMI range and aerobic fitness(with exceptions for non-lifestyle related respiratory conditions) of the insuree during yearly checkups as part of the pricing. Companies that refine and produce food products with refined or added sugars pay an extra tax earmarked for subsidies for gyms, into public health initiatives and general exercise-boosting programs.
Most important of all, increase labor costs for hiring fat people from the employers perspective. Increase the federal payroll tax by 3% (p.p) for every step of overweight past normal, e.g someone with stage 3 obesity(40-45 BMI) has their employer pay 18% payroll tax instead of 6%. Do this with the economically inactive population except with a carrot and not a stick, and give percentage increases on all federal grants and programs(including pensions) for normal weighed people.
With this in mind you will have a society that exerts tremendous economic pressure on fat people, the only incentive that actually works in America.