Yes, drinking culture in the UK is stupid and everyone knows it's a problem. The cost to the health service means that it's not really something that should be tolerated in the long term.
If a national health service is an excuse to tell people how to live, I've pretty happy Obama fucked it all up here and just institutionalized health insurers.
How about the people who engage in that big killer - sedentary lifestyles? If you want to sit in front of a computer all, day, why should everyone else pay for your lifestyle choice? /s
Obama and his advisor Cass Sunstein are ostensibly pursuing "libertarian paternalism", as is Cameron in the UK.
I'm guessing you like the sound of "libertarian".
Alcohol consumption is one clear case of people harming themselves. There are a lot of other areas in which the government in fact doesn't know what's best, so I don't think you can generalize about liberties either way.
See for example: http://www.theguardian.com/commentisfree/2013/may/10/alcohol...