I know it's an aside, but this isn't actually true. Most countries at least try to secure regional balance, not just lump everything in one place (with notable exceptions like France and, to a lesser extent, the UK).
Take the US, Canada, Australia, New Zealand, Germany, Netherlands, Spain, Italy, Brazil, India, Russia, Vietnam, South Africa etc (I could go on). All have different cities fulfilling one of more of the roles of Political, Economic and Cultural capitals (the 3 main roles cities can hold in any nation). In Ireland we've just put everything into Dublin. And then we wonder why the place is over-heated and the rest of the country is struggling. D'uh.
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