I don't know if the following is accurate or not, but I read it once:

The biggest hit song of 1929, right before the Great Depression, was By The Sea. It contains the line, "Ma is rich, Pa is rich, so now what do we care."

The next year, the big hit was a song called I've Got Five Dollars.

The next year, the big hit was Buddy, Can You Spare a Dime.

And the year after that, the big hit was I've Got Plenty of Nothing.