You see, we call it a wifebeater because it is associated with men from the working classes, like domestic violence is! It's okay to call it that because we're being ironic, duh, and also because we don't think domestic violence is important or that survivors deserve respect. LOL!
Fun fact: I myself have drunk several pints of Stella in my time! I have worn many vests! I have even done both of these things at the same time - while not being rich, at that. And yet I have never beaten anyone's wife, nor committed violent assault on anyone I happened to be dating.
It's almost like being poor and drinking lager bear no relationship to one's propensity to perpetrate intimate partner violence whatsoever.