I've got the music for this buried away in the files somewhere, when I find it, which won't be this late at night, I'll post the whole thing. Studs Terkel published an oral history of the Great Depression called "Hard Times". In it, he interviewed the lyricist who wrote this song, E.Y. (aka Yip) Harburg. He discusses this song specifically, and his reasons for writing it. Really a worthwhile read.