To be fair I think smoking is a net benefit to the economy; the high levels of tax and killing people early more than compensates for the healthcare costs.
People don’t just suddenly die though from smoking do they? They become ill, economically inactive, years of treatments for the many, many ailments smoking causes. Then they die.
I'd guess the majority of cigarettes smoked are duty free in the UK now. Obesity costs the NHS about 6.5 billion a year. I'd like to see the government crackdown on that aswell.
No, but I don't see what your point is - that's a question for the government and their allocation of funds.