Right now Americans have $97T in assets (which includes $7T in federal debt) along with $14T in liabilities --that's what gives us the the $83T in net worth we're talking about. If Americans are taxed $7T to pay the debt, then American private bank accounts drop by $7T and the money buys back the bonds and goes into U.S. private bank accounts. Bank accounts don't change but the bond holdings change by dropping $7T. So if we pay off the national debt then Americans get poorer, but the government gets richer because it no longer has the $7T liability.
So for Americans to get richer we need a bigger national debt. I think I'm missing something here...
That seems to be how it works out if you count the individual's federal bond holdings as a asset, but don't count the taxes that will have to be levied to pay them back as a liability. You get an artificially inflated picture of private net worth.