I think that the national debt ought to be based on median income. It should only be a manageable proportion of median income (25-30%), right now it is a multiple of median income (2x and growing). And it is clearly not affordable ever!
This is basically a good idea, that our national debt needs to be managed as a proportion of our other finances. Two things though. One is that debt has to be related to our net worth just like our credit limit takes into account our assets and present debts and not just our incomes. The other is that we need to work with real numbers and not make them up.
<---Here's national debt by total private net worth.
It means two things. One is that the national debt's doubled since 2008 from 9% to 18%, and the other is that liberals are nucking futz.