It's always great to see an extremely intelligent person try to rationalize a core belief that's at direct odds with the cold, hard, and unforgiving reality they live in. The amount of mental gymnastics done here are Olympian, and this guy deserves a gold medal.
However, even the fanciest mental tricks are never going to change the fundamental laws of reality.
In the entire article he dances around second order effects and demonstrates why they're meaningless. Great, but there's one measure that actually matters: the percentage of our annual budget spent servicing existing debt. Right now that number is at 6%, and there's some share under 100% where it will cause our country to effectively go bankrupt. The closer we get to 100%, the exponentially higher the chance of bankruptcy.
Right now there's two things which make me scared this number is going to go up considerably:
One, US tax revenue is going up around 2% a year, but our outstanding debt is going up around 20% a year. The debt is rapidly outpacing economic and tax revenue growth. If nothing changes, paying off the debt will be 25% of our national budget in around 20 years, and 50% in 40 years. That's well within most our lifetimes, and is well in the extreme bankruptcy risk area.
Two, the US has access to unprecedented low rates of interest right now. The average rate on it's 23 trillion in debt is 1%. If that were to go up to a more historical 3%, interest repayment would jump to 24%. Due to the length of government debt, this transition would probably take around 20 years to fully happen.
Now combine the two into a nightmare scenario: debt continues to rise over the next 20 years at its current rate, and interest rates return to their historical 3%; and within 20 years repaying debt will explode to 75% of our budget. There is your potential black swan event.
Hopefully action is taken before any of this happens, but something has to give from where we are now, and pretending that there's no troubled waters on the horizon is absolutely insane and irresponsible.