And cost billions in state pensions. I'm not suggesting that's any sort of counterargument but the costs should possibly be offset against other types of end-of-life care.
It's been discussed. The balance has so far fallen on the side of anti smoking policy.
Australia is a democracy with many small parties and several quasi independant larger party (three main large parties) members, there's been scope for almost anyone to campaign to repeal anti-smoking policy by either running directly or by lobbying their local of federal rep.
People have campaigned for hunting, for cannabis, for many things .. so far no one, to my knowledge, has campaigned to repeal the anti smoking policies.