[gph1]

Agreed re: Greece. Greece's bonds don't have the credibility because they aren't denominated in a currency that Greece controls.

There's no reasonable analogy between the US running a deficit and anyone's credit card. Again, like the commenter at the top of the thread, public and private finance are two different things. The US has infinite spending power. The constraint is not "affordability" but inflation. That's it. A "financially sound" budget for the US is one that maximizes employment with the minimal amount of inflation. It has nothing to do with deficits or surpluses.

You need to look at the federal budget as part of a closed loop of spending and income flows with the private, public and foreign sectors. Just like every country can't run a trade surplus, the public private and foreign sectors can't all run a surplus or a deficit. It has to net out. If the private sector runs a surplus (spends less than it earns) of 4% GDP and we have a current account deficit of 4% GDP, the gov't deficit will be 8%. It's just accounting.