Some links if you want to explore the allegory:
https://cactus.utahtech.edu/green/B_Readings/Hugh%20Rockoff%20%20Wizard%20of%20Oz.pdf
https://en.wikipedia.org/wiki/Cross_of_Gold_speech
https://www.andrew.cmu.edu/course/88-301/data_of_macro/cross_of_gold.pdf
And some discussion of the greenback for some more context.
Some links if you want to explore the allegory:
https://cactus.utahtech.edu/green/B_Readings/Hugh%20Rockoff%20%20Wizard%20of%20Oz.pdf
https://en.wikipedia.org/wiki/Cross_of_Gold_speech
https://www.andrew.cmu.edu/course/88-301/data_of_macro/cross_of_gold.pdf
http://www.themoneymasters.com/the-wonderful-wizard-of-oz-a-monetary-reformers-brief-symbol-glossary/
And some discussion of the greenback for some more context.
http://www.xat.org/xat/usury.html
(post is archived)