“Every year recently fewer and fewer countries are willing to buy US securities. “
The trend for less foreign buyers of U.S. debt is not catastrophic. It grew higher to 49% in 2011 and has trended downward closer to what it was in 2002 - about 34%. A strong dollar is one of the reasons - when the yen is worth fewer dollars, the Japanese buy fewer U.S. treasuries, because they become more expensive; same for other countries in a similar situation.
But yes, regardless, the interest on the federal debt is really the biggest current fiscal problem the federal government has at the moment, but as grave as that issue is, the pending deficit of Social Security could make Social Security alone insolvent before anything else.
Where I disagree with Trump’s econ people is that we can produce enough GDP growth, that will produce more federal tax revenue, such that “we can grow our way out of debt”. Feasible if the size of the debt can be offset by a set continuing annual increase in GDP. I think we cannot get to GDP growth to make the theory work in reality.
I agree with you.
We could never grow revenue faster than the government can spend it.