I once had a link that actually broke things down. When you factor in that fats are sicker for longer, require special bariatric care, have all these medications constantly being made, and that sick citizens are less productive and pay less taxes, the cost of obesity on a government outweighs (tee hee) the cost of those same citizens making it to 80+ years and dying of natural causes. Maybe like 50 years ago obesity wouldn't have been so much of a burden on the healthcare system, but technology and medicine lets the fats live for longer and rack up the $$$$ to the point they've become the most expensive.