Governments can always get monies

For bond interest payments due, the Treasury receives far more in monthly tax receipts than it owes in monthly interest payments. As of the end of fiscal 2022, interest payments due on U.S. Treasuries accounted for just 9.7% of total tax revenue. This is akin to making $10,000/month in salary and having a $970/month mortgage payment, which would of course be easily manageable.

The U.S. Treasury Receives Enough in Paid Taxes (blue bars) to Cover Interest Payments on Debt (red bars)