The “two-speed economy” debate of a few years ago was really only a preview of what we could see if the resources sector build-up goes ahead. A further implication is that the economy’s trade patterns could end up becoming less diversified than they have been in recent years.
Such concentration would not be unprecedented and may well be worth accepting if the returns from doing so were high enough, as it appears they might be. But we might also think about how to manage the risks associated with any concentration.