Economic lessons from the Wizard of Oz?

A story on the BBC website claims that the story, The Wonderful Wizard of Oz, is used as an economic parable. It is one of the world's best-loved fairytales, and the 1939 film is the most famous evocation of the story. However, the story has underlying economic and political references that make it a popular tool for teaching university and high school students - mainly in the United States but also in the UK - about the economic depression of the late 19th Century. But not everyone believes The Wonderful Wizard of Oz includes any hidden meanings - and it is unlikely any young fans will think about deflation and monetary policy when they view it.