You do know PV works well only to compare and contrast the outcomes from two different proposals ~ e.g. to build a new building or to fix the old one.
It ties in well with the math used to determine a Return on investment (ROI).
However, the numbers themselves are a fiction.
That dollar on deposit at Barclays really won't be worth $6 trillion in 5,000 years when you pop out of your time machine ~ failure to 'churn' (there are lots of names for it) is usually punishable through termination of your account.
So, if instead of using PV value calculations, we use “actuaraily sound figures”, is America’s debt and future obligations situation better or worse?