Yeah, this is a tough one. There are plenty of folk/country-type songs about the topic, but I can't immediately think of any in the garage-punk vein. You might see if there's any suitable cover versions of "Dark as a Dungeon", "Blackleg Miner", or "Nine Pound Hammer" out there (of course, the band Nine Pound Hammer is named for the song, but I don't know they ever covered it). And the Dropkick Murphys did a cover of "Which Side are You On" a few years ago.