Addiction is a proven chemical process, which some are more susceptible to than others due to their chemical make up, if you have better willpower or are less chemically dependent is open to debate obviously.
I find the idea that an outside agency has the right to imprison you or impose a debt on you for what you do in the privacy of your own home abhorrent, especially when we consider that the government have a history of sacking experts that disagree with what is considered politically correct at the time.
If those under the influence cause loss, distress or harm then obviously they should be treated for their addiction, especially if it is a government backed drug such as alcohol.