The large budget deficit of the United States runs up to three trillion dollars now.They are anxious to stabilise their currency, but can't stop their 'way of life'.

China and Japan bailed out the U.S. by almost four hundred billion dollars. They are acutely aware of their dependent position. Asian countries in turn hoard these falling dollars and assets. As long as they are motivated by self-interest, they won't drop the dollar...more detail in The New Yorker, by James Surowiecki 

 via http://kottke.org/