That’s a slippery slope. It may make sense but when you start regulating where does it end. Who decides what is a “healthy” BMI. Maybe less than 17%=while certain governors roll around in their obese bodies eating what the want?
Like as with gov. shutdowns which should include the salaries of the pols being suspended, so any such penalizing of overeating should include the top. When food gets tight and the gov. rations food, the gov. could test people for their BMI and regulate what they can buy, since the gov. likes to regulate and control. However, some people do have a problems that are not due to overeating.