Its always amusing listening to expats tell us the wonders of running away while they pay no attention to where they are. There is also a fantasy that the rest of the world will go to hell but where they are will magically be unchanged.
The US economy and purchases have been driving the world economy for quite some time.
World Collapse Explained in 3 Minutes Youtube video
http://www.youtube.com/watch?v=NOzR3UAyXao&feature=player_embedded