except he now has to go outside the walls to get the liquor. or someone does, since i don't see him doing it that often. i also don't see others enabling him in this but they would have to be.
it would go like this:
party of 5, head into town on a supply run.we need food, ammo, a tv guide, and oh yea, a 2 weeks supply of liquor for our alcoholic. who's got alcohol duties this week?
a 2 week supply for an alcoholic could likely be in the neighborhood of 4+ 1.75 bottles of we'll call 80*. since he's not likely the only alcoholic living in the post apocalyptic world, we can assume even casual drinkers would be on a run through town, grabbing a few bottles as they go. if we're now 1+ year into this since it started, that would be 104 bottles of 1.75 a year.
also, if drinking this much he'd not be in the shape he was in to take out lone wolf grimes very easily. daily drinker vs daily survivor...they didn't think this through before the fight. rick does seem to get his *** kicked a lot.
in any event, i still think alcoholism would be hard to maintain in this type of society, but whatever.