We know that people that get hooked on either of these things are hurting themselves. Furthermore, since they tend to be lower income, its likely that whatever health complications they get will end up being paid for in large part by us since over half of bankruptcies in the US are related to medical costs, and the loss to providers from those services are passed onto the rest of us.
Therefore, we should help them help themselves by de-incentivizing undesirable expenditures like cigarettes and alcohol and help American society in the process by having fewer sick people. Everybody wins.
No. That's not what we're about. It isn't that the people choose to smoke or drink. I don't give a shit about what people choose. But sin taxes discriminate in the same way that drug laws discriminate. Yes, the poor, those who are least able to afford the taxes, are the most likely to pay them. Poor people don't buy cigarettes and alcohol because they're easy to buy, they buy them because their lives suck and smoking or drinking makes them feel better. They know that cigarettes are unhealthy, and that alcohol can be destructive. They've probably witnessed the effects. But they don't particularly care, because the hurt is now and the relief is the buzz of a Marlboro or the numbness of a beer. If you've tried cigarettes or alcohol (or even both at once...mmm...) you'd understand.
"But then the poor people get sick and we have to pay for them! That's no fun!"
True. But that is precisely why we have such a system. To help those in need.
There are lots of things that cause illness. Sex causes the spread of diseases like AIDS and syphilis. Sugar causes diabetes. Red meat raises cholesterol. Fish contain mercury. Even exercise can cause broken bones, muscle strains, shin splints. I'm not saying that it's as bad to run a mile as it is to suck down a Camel, but if the primary argument is the burden on the taxpayer, then you're sounding more like a libertarian than I think you'd like to admit.
I'm all for anti-smoking campaigns. I'm all for AA. You can talk at me until you're blue in the face about the dangers of dependency but if I'm working 14 hours a day in some shithole and you charge me a half-hour's wages for my pack of smokes so that you don't have to pay 20 bucks a year to your local hospital I'm gonna be pissed. My life won't get better if it's harder for me to buy cigarettes. It'll get worse. If you don't want any kids to start smoking, then ban cigarettes. Go ahead. It's not the lack of choice I'm worried about, it's the discrimination. If you think these... sins are worth eliminating, do it. But shaking your finger and taking my money just makes me feel bad, and that's no fun.
I may have presented a couple of half-written arguments here, and if so I apologize, but it's late and I'm kinda angry.