This was not where we were meant to be in tackling the underlying causes of the crisis and returning the world to sustainable growth. Yet beneath this sense of frustration at lack of progress – and at international organisations such as the IMF and the G20 to bring it about - there is an underlying truth that's often left unspoken; many of the problems in the world economy right now are not international at all, but US specific and can only really be solved by America itself.