From cradle to grave, a cigarette smoker is the cheapest to insure. Cancer and chemo therapy is relatively cheap.
They die early and never collect their Social Security and often lose the value of their retirement annuity.

It's the carbohydrate/sugar/boozers that cost the most. Their biggest expense is often caused by type 3 diabetes and a stroke, followed by years
in a nursing home. Now that's expensive!