YES...we also need a better carrot stick approach to those people who don't take care of their very own bodies, by wasting their bodies with excessive consumption of processed, nutrient-free, chemically laden "food" that induces diabetes and a whole host of other wasting diseases. 

Yes, alcohol, tobacco, and any other HARMFUL drug in excessive amounts too. Smokers are legally charged extra for health insurance, for good reason. Why not obese folks...instead of the R-conway of believing that insurance companies simply should have the right to cherry pick their insured customers. 

A single payer option has a better chance of succeeding when all players have a certain amount of responsibility and skin in the game too. Both Carrots AND sticks are needed. 

As of 2014, the most obese country in the developed world was USA, with 33.7% percent of it's population being classified as obese.   We're #1, We're #1, USA! USA!