Reddit reviews The Global City: New York, London, Tokyo.

No you are arguing against megacities and economic command centers they facilitate. To create or rathe in London's case sustain such a city you need to pump in large amounts of resources, the benefits however outweigh the costs,there is a good book on it here if you are interested, old now though. Some of the basic points are to do with attracting FDI and spreading the cost of infrastructure projects.

>Keeping wealth in one region at the expense of the rest is what this guy is arguing against.

There are problems, no model is perfect, but the economics of Megacities have many many advantages. It the reason why we see so many all over the world in different cultures, societies and economies of all sizes.