Mansa Musa is said to have been so wealthy he crashed the economy of Egypt by giving away gold. Extremely wealthy people is not a new phenomenon. Maybe monarchs don't count because they're so wealthy they own entire countries outright? It seems to me that makes them more wealthy, not less.

To keep that in perspective, the GDP of Niger (population 22 million) is about the annual budget of San Francisco (population 900 thousand).

Is comparing very poor countries to individuals from very rich countries a relevant framing? Global wealth disparities aren't a new phenomenon (and global wealth inequality is decreasing!)