Taught macroeconomics for decades to help business students understand the state of the economy. Maynard Keynes taught how to use government controlled money, obtained from taxes and bond sales, to maintain a stable economy. In Keynesian economics debt and deficits are bad except in an emergency, gradual expansion of money supply to keep up with population growth and balanced budgets are good.
Modern Monetary Theory (MMT), implies the government can use pixels on a screen to create an infinite amount of money without consequences,. This took me by surprise.
This was like recently looking for a new car with a tape deck to replace my 92 Geo Storm because I have lots of good tapes. It has been decades since cars came with tape decks.
While MMT Modern Monetary Theory has obviously been embraced by most federal agencies it is hard for me to consider a workable alternative to Keynesian Theory.
Modern Monetary Theory (MMT) describes currency as a public monopoly and unemployment as evidence a currency monopolist is overly restricting the supply money needed to pay taxes and satisfy savings desires. Advocates of MMT argue governments can use fiscal policy to create unlimited amounts of new money.
MMT's main tenets are that a government that issues its own money:
These tenets challenge the mainstream economics view that government spending is funded by taxes collected from persons and businesses and by government borrowing in the form of selling bonds to people, nations and businesses who buy them because they make money over time when the amount they initially paid for the bonds, plus interest are paid back.
According to proponents of this theory the first four MMT tenets do not conflict with mainstream economics understanding of how money creation and inflation works. For example, as former Fed Chair Alan Greenspan said, "The United States can pay any debt it has because we can always print money to do that. So there is zero probability of default."