You have $100k income, and $800k debt, on which you have to pay ~$40,000 interest every year. That takes up a good chunk of your income. But if the debt doubled, at the same interest rate, you could really be in trouble.
Not if your income was partly “getting loans from the bank” and now the bank won’t lend you money anymore, which is more in line with what the debt means for the us.
A better analogy would be this:
You have $100k income, and $800k debt, on which you have to pay ~$40,000 interest every year. That takes up a good chunk of your income. But if the debt doubled, at the same interest rate, you could really be in trouble.