Is he advocating that investors in Treasury securities take a haircut? That’s not exactly the way to inspire confidence in investing in the U.S. because you’re basically saying that investing in U.S. treasuries is a bad risk.
He is correct is saying that we will be in deep doodoo if interest rates rise a couple of %.
The problem is that if the debt buyers take talk like this seriously, the interest rates WILL go up, and a lot more than a couple of percent. We've got to hope that some adults in his organization sit him down and talk some sense into him about global economics.