Wow. I think there's a lot more to this than meets the eye. Reading your post, I was reminded of the David Bowie song "This is not America". I looked it up on Wikipedia. It was written as part of a movie score, for a film called "The Falcon and the Snowman" which was based on a true story related to the fall of the Gough Whitlam government, which was apparently engineered by the CIA, because Whitlam had proposed getting rid of US military bases. Apparently our Queen might have been in on it too, and Prince Charles. That song opens a can of worms! Hmmm... Makes you think.
And as for the Wizard of Oz - that interpretation sounds spot-on! I'll have to watch that film again.