There’s a well-known theory that the Wizard of Oz is a political parable about the conflict between those who supported the gold standard and those who supported the silver standard. In the book, Dorothy wore silver slippers, not ruby slippers, Oz is the abbreviation for ounce, the yellow brick road represents gold, the Emerald City represents paper money, etc.
FWIW, L. Frank Baum favored the annihilation of the remaining Native Americans.