Let me carry this logic one step further.  People should be responsible for their actions.  The main killers: heart attack, stroke, cancer are life style induced. 

let's have a FAT TAX.  Let the fatties pay higher insurance premiums, higher rates for medical attention.  According to the surgeons, it's harder to operate on a fat person,  cutting through all that fat to get to the problem.  This incurrs  more billable time and labor intensive effort.