Krank,
Like I said, I'm not too sure of the figures and I'm not in the business of making guesses, however I do know for sure that the taxes from cigarettes are a piss in the ocean compared to the associated costs to the community, even taking into account the usual levies that everybody pays and so on.
I like Tony's idea of medicare levies being based on peoples BMI and some basic medical examinations. The healthier you are, the less you pay. Unfortunately the only way to get some people to get their arse into gear is to hit them in the hip pocket (as if the prospect of a heart attack, type 2 diabetes, lung cancer or emphysema is not enough to make you want to look after yourself....)
Some of my best mates and family are smokers, and I say the same thing to them. It's not because I have a vendetta against them, it's because I care about them and I don't want the people who mean so much to me to die or be vegetables in hospital because of some stupid disgusting habit. You wouldn't wish any of those medical conditions on your worst enemies, so of course you would try and encourage people close to you to steer away from these bad habits which cause these conditions. Likewise, the people who research the effects of chronic disease do it because they get incredibly frustrated at people's inaction and they want to see a healthy population - it is not for their own benefit. Sure, whenever politicians stick their noses into anything it turns to shit, the best policies get squashed before they even get to parliament or senate.
We speak about the government as though it's this big faceless cloud of bullshit, but remember that public servants & contractors (the people who do the research and legwork behind most of the policies) are apolitical, in other words, they do their work same regardless of who's in power. The difference lies in how (or if) their work is implemented by the politicians. You'll find that most people who work in government policy development actually hate politicians, because the politicians generally throw their work in the bin if it doesn't help their chances at re-election. Anyway i'm getting slightly off topic now...