Is most of the huge US debt re-payable at a fixed rate or do rates move with international rates ?
If it is the latter then that is a huge mount of extra money to repay if rates rise.
I don't think tax rates are likely to rise much for the rich as they ( in the US particularly ) have the levers of power and are unlikely to tax themselves more. It would be an election loser too.
I did not know this until recently, but apparently it is mostly short-term debt. Bills and notes. I would have thought they would have locked in the low interest rates.