Originally Posted by
Kevo
My understanding, feel free to correct it I'm incorrect-
Printing money with QE- Fed prints money to buy treasury bonds. The Fed now owns treasury debt. The payments on the debt are made by collecting and remitting tax revenue.
Printing money in default to cover debt obligations- congress cannot come to an agreement to remit enough tax revenue to cover debt payments, so instead the fed prints money to pay bond holders. This scenario isn't directly caused by a lack of revenue, but the default will lead to lower credit ratings and increased rates for US national debt going forward. It is conceivable that interest rates on US government debt could get so high that it is impossible to raise taxes enough to cover debt obligations in the future.
Countries that have had some form of the latter (can't pay debt, so print more money) have often experienced hyperinflation and currency collapse.