Bidenomics is a mixture of things, but key among them is the recognition that MMT is already reality and doubling down on it to fund productive industries. Basically, government debt is not the same as household debt and strategic yet liberal usage of government debt can be very positive for an economy. MMT economists have made some pretty significant ‘discoveries’ that you can now find in the CORE macroeconomics textbooks in universities all over the world.
Under the (currently dominant) credit theory of money, the implication is that billionaires owe the government a lot of money… and it’s time to pay up.