If $6.4 trillion will take 100 years to pay off, $23 trillion will take nearly 400 years.
Or, if we the people were to gain control over our elected houses and declare we aren't paying as we never authorized nor wanted these wars game over for them. Let them collect it from their stooges who rammed it down our throats, and their profiteering buds in the military industrial monopoly.
Yup, that would be a lot better. Siphon the massive profits and the bank accounts of those companies and their leaders to pay off the debt over decades, since all the money was paid to them.