See Dubai's Fantasy Island Gamble in the Persian Gulf Comes to an Ugly End by Numerian
This article about Dubai's falling apart ends with:
"Sound familiar? When do you think global investors will start connecting these dots and ask: exactly what is backing the debt of the United States that has flooded the markets in the past nine years under Bush and Obama? At least Dubai had a presumed rich uncle in Abu Dhabi that would come to the rescue, even though now everyone realizes that was a very costly mistaken assumption. In the case of the US, the United States was the rich uncle everybody else looked to in order to solve global problems. Now that rich uncle has gone crazy in its own orgy of gambling, whoring, and over-indebtedness."
"Except there is no one – absolutely no one – who can come to the United States’ rescue. And if you want to believe that the US would never, ever ask for a little extra time to pay back its debt, or ask for it to be restructured in some way, or debase its currency with inflation in order to throw its debt burden on to those who have financed it, that is your affair. Just remember there are millions of individuals, funds, corporations, and governments around the world who have bought US Treasuries. It only takes a few to wonder long and hard enough about just how safe and secure these Treasuries are to cause a stampede out of them, at which point the US is exposed like Dubai as a naked supplicant in the global market, begging for alms and a little forgiveness for past sins."