If there was something that needed to be handled, then it would usually be the Balancer association or something else that would mainly issue out a lot of information and tasks to anyone involved in the supernatural world.
The Balancer association was deeply tied to the great families and also to the various organizations in order to help maintain the current order and peace.
The Balancer association and the schooling systems were existences that did not just in the Capital and they were spread out throughout the country.
Having them spread out in branches like that allowed a lot of ground to be covered, and it allowed greater control over many things, including information on events taking place in each city and anything related to Balanced organizations and Balancers.
Even if the great families remained in the Capital, they still had many means of maintaining their hold over the country, and they could know a lot of things that were going on within it.