from the following link (Council for Economic Education), there are 28 states requiring students to take a course in economics to graduate.

https://www.councilforeconed.org/policy-advocacy/survey-of-t...

https://www.forbes.com/sites/lizfrazierpeck/2024/04/01/2024-...

The phrase should be read as "oversimplified Econ". If it were just about the money supply, increasing interest rates, which reduces money supply by suppressing loans, as well as the end to the money handouts during the shutdown, would have been enough to take care of it. But there's also market concentration which has allowed big players to raise prices a lot more than their costs have been raised, increasing their profits.