[Arnfinn Madsen]

Well, you aren't a economics champion either.

I am not claiming a US collapse, but assuming that nobody wants to screw you over since you owe they money shows no understanding of how it works. It is explained earlier in thread, the US debt is refinanced continiously by issuing new bonds and using the money to pay interest and pay bonds that expire. If fear of lack of US payment would arise, it would lead to a risk premium on new issued bonds (already issued ones are set) meaning that interest rates would increase sharply, meaning that GDP would decline, meaning that investors would demand a even higher risk premium etc. etc. A vicious cycle. This also shows that your interest as part of GDP-argument is irrelevant as bonds with current interest rates would expire and be replaced by higher interest ones.