Hmm, I'm quite surprised. For sure, high levels of alcoholism are correlated with poverty and lack of education. Random study:
"In the weighted model, a one-unit increase in neighborhood poverty at the prior examination was associated with a 86% increase in the odds of binging"
http://journals.lww.com/epidem/Abstract/2010/07000/The_Relat...
Anecdotally, all the cases of alcohol abuse I hear about tend to be in disadvantaged homes.