Normally, I think food stamps means to buy food...only. There are some people who will not feed their families first, if they want to drink. But, there is a chance I do agree with you on this only because sometimes, a beer, can diffuse a dangerous situation. Sometimes, you just don't know.
With today's job market being what it is, what todays prices are, and many just barely, hanging on to everything, it can create an aggression that normally, those folks or many folks may not otherwise feel. For some, the pressure is too great to handle. For those folks, yes, buy a beer, to relax so, no one gets hurt.
Sometimes, to diffuse an anger in a person, all it takes is a beer, to feel that ole' feeling they once had, it gives a subtle hope for tomorrow. I'll even buy the beer.
I hope this makes sense being that it is complicated to explain.