You guys seem to be a bit lost because the debt of one person is an asset for another. So, while the national debt is exploding who is accumulating the assets represented by it?
And when thinking about it, remember that in the case of the USA alone it is estimated to cost around 1 trillion a year in net interest payments in a not very distant future.
"In dollar terms, net interest is set to cross the $1 trillion per year mark in 2026 and $1.6 trillion in a decade."