Worse still, what we often have is an inverted Darwinism: the survival of the unfittest. It is not the best projects that get chosen, but those that look best on paper. And these are the ones with the largest cost underestimates and benefit overestimates. They are disasters waiting to happen.
It has become increasingly clear that when megaprojects go wrong they are like the bull in the china shop: they can damage national economies. It has become similarly clear to many involved that something needs to be done.