Oz Symbolism for the New Gilded Age

Dorothy -- Middle class
Wicked Witch of the East -- Eastern Bankers and Wall Street
House that falls on Wicked Witch of East after the tornado (which represents the homeowners revolt) -- Subprime mortgages, CDOs, SIVs
Munchkins -- the underclass and child labor (the Lollipop Guild)
Wicked Witch of the West and her flying monkeys -- Corruption in the lending industry
Tin Man -- Manufacturing economy
Scarecrow -- Agricultural economy
Cowardly lion -- Ben Bernanke, who eventually finds courage to act
Emerald City -- Washington DC
The Wizard -- Name your favorite politician
Silver Slippers (in the book they weren't ruby) -- Monetary policy
Toto -- Apple's new ultralight laptop (digital communication), a small bundle that's able to save the day

In the end the wizard can't help Dorothy. Civilization is saved by the magic of the silver slippers, and the help of her friends -- the tin man, scarecrow, lion, and Toto.