We’ve had a very large amount of debt for a long time. You sound a bit like a Christian warning us we are at the end of times. We’ve been hearing THAT for 2,000 years. Still waiting…
Actually, the debt doesn’t concern me at all because I’ve heard this argument for decades. Also MMT is a better explanation of what’s happening than the notion that a country with a huge economy and issues it’s own currency can’t manage debt.