The sad good side is that you don't see too many fat old people.  They die much younger from health related issues.  So you are correct.  There is going to be less strain on the social security system taking care of them when they are old.  Now though we are seeing obesity as disability.  How can being fat be compared equally with someone who is a paraplegic or a torn up war veteran.  I stream when I see a land whale parking in the handicap and the only thing I can see wrong with them is FAT.