I think Gilby had the answer
M0 is the amount of printed dollars. M1 is the amount of printed dollars plus the electric money in all the accounts.
M2 is M1 plus small CD’s and stuff. M3 is M2 plus even more stuff, like all the bonds and anything else they want to count.
So basically, the amount of printed money means nothing. It has no connection to the debt. If people use electric money more, they will print less dollars, and if a lot of people suddenly demand their dollars, they will sent them a truck full, and print more then. Basically, they print as many dollars as they think people are going to ask for. It is valued the same as the electric dollar that lives on some machine in a Fed branch somewhere. It’s value has no connection to the amount or value of gold in Fort Knox.
Fort Knox is a historical relic left over from the time when the exchange rate and debt between countries was accounted for with gold, but those days are long past.
The USA gov debt is mostly in the form of pieces of paper that say the bearer will be paid 20, 000 $ in 20 years. These are then sold on the market for a lot less then 20,000$. USA Fed reserve banks must buy so many to have a credit line with the central bank. Various countries buy them for various reasons, because having a big credit line in dollars facilitates trade.
So basically, the USA debt is so much larger then the paper dollar supply, for the same reason you can buy a 200,000 $ house with 10,000 $. You can borrow a whole lot more money then you could earn in a year. So you never have to save up 200,000 $ at once in a pile. Just like we don’t need to have 10 trillion $ stacked in a vault somewhere for the USA to go so far down the hole.
Personally, I think some gov debt can have advantages, but that point was long passed, about 9 trillion dollars ago.