It's an inherent flaw with any usury (interest). The aggregate obligation (principal & interest) far exceeds the whole set of available money tokens. In other words, the money needed for all to pay their creditors
DOES NOT EXIST.
Look at the USA's national debt.
https://www.usdebtclock.org/
NATIONAL DEBT = $32.726 trillion dollars
(Debt per citizen = $97,606 dollars)
INTEREST = $664.93 billion dollar bills
Federal Reserve Balance Sheet: Factors Affecting Reserve Balances - H.4.1 - November 16, 2023
Search report for “currency in circulation”
Federal Reserve Banks . . . Aug. 23, 2023
Currency in circulation . . .
2,328,554 millions (2.3 trillions)
[Note: “Dollar bills” being debt, are part of the 32.7 T national debt. They cannot grow without an increase in the debt. Debt cannot pay debt, having a minus value. Even if the dollar bills could, there isn't enough of them.]
US Population = 335,145,075
Currency (per capita) = $6,947.89 dollar bills.
Discrepancy : $6,947 - $97,606 =
-90,659 (shortfall)
This problem extends to all private debt, as well. Outstanding obligations far exceed the volume and value of circulating medium. This is partly masked by the preponderance of "electronic" money transfers. If everyone tried to "cash out" the system would implode, and folks would be fortunate to get microcents on the dollar bill.