You can't sustain high government debt and high interest at the same time. "Federal government current expenditures: interest payments" are now at 0.9 trillion

You can't sustain high government debt and high interest at the same time. "Federal government current expenditures: interest payments" are now at 0.9 trillion dollars annually. If inflation increases tax revenue fast enough then ok no big deal but that would still mean the interest rate has to be lower than inflation and if inflation has a downward trend then I would expect the interest rate to follow it with a huge lag.