Original book was written about monetary policy and politics in turn of the century America. Characters all represented different factions in this allegory.
www. offthegridnews.com/misc/following-the-yellow-brick-road-the-real-story-behind-‘the-wizard-of-oz’/
This article isn't bad explanation. We have been on a + ++ +++ fiat back money scam for generations. They control everything and have for a long time.
Current cast of characters is speculation. The Wizard of Oz has a deeper historic meaning.