Personally I think it's a bit rich telling other people how to live because you're concerned about saving a few quid on your own taxes(same goes for drinking or smoking... you can pay a high price in life for most of these things and we pretty much all already know the risks)... in fact I think it's a real shame there always seems to be such a large portion of society(who aren't actually struggling at all to get by evidenced by all their spare time to ponder who's making their country shit) trying to make out they care but really just concerned with their own pocket, whether they blame immigration, obesity, alcohol, unemployment... anything they feel doesn't concern them is the answer? How convenient...
If someone is fat and happy, knows they will probably die young then let them... the alternative might well be they could simply grow old miserable, clinging on to a life they never made the most of all while picking up their pension for years after the fatty you said was a burden has long since gone.