What would happen if we just cancelled the national debt?

This thought experiment helps illustrate what the national debt actually is. Imagine the government simply cancelled all outstanding Treasury bonds - what would happen?

First, nothing dramatic operationally. Treasury bonds are just accounts at the Federal Reserve that pay interest. Cancelling them would mean changing those accounts to non-interest-bearing accounts (like reserves). The dollars don't disappear; they just stop earning interest.

Second, it would hurt bondholders who depend on interest income. This includes pension funds, retirement accounts, insurance companies, and foreign governments that hold Treasuries. They'd lose a safe, interest-bearing asset.

Third, it might cause problems for the Fed's interest rate management. Without bonds to drain reserves, the overnight rate would tend toward zero (not necessarily a problem, but different from current policy).

Fourth, the 'national debt' number would drop to zero, but the private sector would still hold the same amount of dollars. The dollars in your bank account wouldn't change.

This thought experiment shows that the debt isn't really a burden that needs to be 'paid off.' It's an accounting record of safe assets the government has provided to the private sector. 'Paying off the debt' means eliminating those assets, which isn't necessarily desirable.

In practice, nobody seriously proposes cancelling the debt - but understanding what would happen helps clarify what the debt actually is.