1 - I don't think it's a "hillbilly" song.
2 - MBM's initial post is basically just an opportunity for him to trot out these Southern stereotypes and mock these people in a "what do these backwards yokels who listen to this kind of music have to be happy about?" kind of way. And I think that's crap. I said already that none of us are completely, 100% free. But certainly Southerners are under no more delusions than their northern counterparts, who are free to suck in all the smog from their gas-guzzling SUVs, free to spend five grand on a shoebox apartment, free to eat overpriced French food made by a pair of Mexicans in the back kitchen, etc.
The question was in what way are they free, and my answer is in the same damn way that the rest of us are "free."