Beer for My Horses Lyrics

Lyric discussion by dcroxton 

Cover art for Beer for My Horses lyrics by Toby Keith

Does anyone think this song might not be entirely serious? I mean, most of it is an inspiring, law-and-order song, but then he ends each chorus with "...and beer for my horses," which sounds pretty silly. I think he's saying, "We're going to play up cowboy justice because it's fun and it's a nice idea, but we realize that we can't just get a posse together and kill the bad guys." If it's not intended to be at least a little ironic, I would like to know the significance of the line "beer for my horses."