Whilst the west has been spending, the East has been saving.
Put that equation over a long enough time frame and their is a lot of money available to invest.
may seem like that when you come from a low base and it is concentrated in the hands of a few, however the symbiotic relationship ensures that the likes of apple make more from an iphone sale than the guy that throws it together in china. until the 'east' can pull its weight in this regard it remains playing second fiddle in the equation