Around 25% of medicare and medicaid spending has to do with complications related to overweight-connected diabetes. That is huge but likely underestimates overweight costs because arthritis, breast cancer, heart disease, and many other problems are also related to or caused by being overweight. For that, and related interesting medical cost info, A Provocative Health Care Proposal
Also, here's this: Why Your Weight Is a Bigger Cancer Risk Than Smoking
Should medical insurance charge by BMI? And are EBT cards really helping people run their lives better? Statistically, weight is social class-related.