Well to be fair the US was the major player in enforcing the financial system on the world.
When you think about it, it doesn't really matter if the US gets more debt because they already have a totally un-payable amount.
If your ship is going to sink you may as well try and save other peoples while your at it.
That being said when the US inevitably sinks all countries will be dragged down too so you are damned if you do and damned if you don't.





