Some of those points are touched on in here:
https://us.yahoo.com/finance/news/america-debt-problem-storing-trouble-161948561.html
The high and rising level of US government debt risks driving up borrowing costs around the world and undermining global financial stability, the International Monetary Fund has warned.
The IMF said Wednesday that increased government spending, growing public debt and elevated interest rates in the United States had contributed to high and volatile yields — or interest rates — on Treasuries, raising the risk of higher rates elsewhere.
“Loose fiscal policy in the United States exerts upward pressure on global interest rates and the dollar,” Vitor Gaspar, director of the IMF’s fiscal affairs department, told reporters. “It pushes up funding costs in the rest of the world, thereby exacerbating existing fragilities and risks.”
It’s the second time this week the IMF has fired a shot across the bows of the US government. On Tuesday, it said public spending and borrowing was contributing to an overheating of the US economy, making it harder for the Federal Reserve to defeat inflation.
Higher interest rates make it more costly for households and businesses to service their loans, which can lead to defaults that cause losses at banks and other lenders, increasing financial instability.
There are risks for the United States too. According to the IMF, investors are demanding higher returns to hold US Treasuries, reflecting their concerns over sustained inflation, the uncertain future path of monetary policy and additional debt issuance in the world’s biggest economy.
The US government’s interest costs on a common measure soared to $659 billion in fiscal year 2023, which ended on September 30, according to the Treasury Department. That’s nearly double what it was in fiscal year 2020.
And according to the Committee for a Responsible Federal Budget, a non-profit, in fiscal year 2023, the government spent more to service its debt than it did on each of housing, transport and higher education.
The IMF expects US public debt to continue rising, helping drive government debt worldwide to close to 100% of global gross domestic product by 2029, from 93% last year.