E.Y. Harburg was a lyricist who wrote "Paper Moon" and all the songs in the Wizard of Oz including one of the most popular songs in history, "Over The Rainbow." He's literally in the Songwriters Hall of Fame.
He also wrote a song that became the anthem of the Great Depression called "Brother Can You Spare A Dime?" It's a heart-wrenching tune, and it sums up both the sadness and anger of the period.
And apparently, some company online thought it would make a good ringtone.