Another issue is the central banks that print the money. They lend that to the government - with interest. Now if you think about it, it is not possible for any government to pay that money all back.

Imagine: They print $1 billion at 10% interest. Next year, the government then owes the bank $1.1 billion but only $1 billion actually exists. How can they ever pay back that interest? They borrow more to pay back the interest. After a few years of that the government runs up a debt of $trillions.

In this example and my previous one, the banks are inventing money and charging interest on it.