Well, firstly, whole of Europe isn't one currency. Secondly, not everything for which there is a European precedent is likely to be extended to the whole world. I am really not sure who's exporting whose economic policy where, to be honest. I completely agree that US and China have achieved economic interdependence, but I would question whether it's sustainable in the long term. In fact, judging by the crisis and its aftermath, the sort of "economic cooperation" that characterizes the Sino-American relationship is anything but sustainable. So I really have a VERY hard time imagining the world governed by US and Chinese interests.