My understanding is some of it about 20% is intragovernmental,like borrowed from SS. Not that it doesn’t matter, but the 100% left is what sets the interest rates. The other 20% will start moving into the 100% public debt at some point. So it can get worse even if we stop borrowing.
Looking at the list of counties I’m thinking maybe some of these other counties need to pump their debt to GDP ratio up to be more like the US or China.
High inflation will fix this: it balloons the USD denominated GDP, so very soon this will be less than 100%. At the same time, the US will export inflation to other countries, since products are denominated in inflated dollars, and pressure them to live with high inflation as well, ultimately forcing the value of other currencies down with respect to the dollar.