Most people will get cancer or some terminal illness that requires expensive treatment eventually. And if they don't then they will live long enough to require

Most people will get cancer or some terminal illness that requires expensive treatment eventually. And if they don't then they will live long enough to require assistive living which is also very expensive. Lung cancer is particularly aggressive and trends to kill people right before retirement age so the argument has been made that smoking reduces overall costs because you don't have to spend money on as many retired people who otherwise would need assistance.