Anything you can Do by Randall Garrett — Read

Government City was something of a paradox. It was the largest capital city, in terms of population, that had ever been built on Earth, and yet, again in terms of population, it was nowhere near as large as Tokyo or London. The solution to the paradox lies in discovering that the term "population" is used in two different senses, thus exposing the logical fallacy of the undistributed middle. If, in referring to London or Tokyo, the term "population" is restricted to those and only those who are actively engaged in the various phases of actual government -- as it is when referring to Government City -- the apparent paradox resolves itself.

Built on the slagged-down remains of New York's Manhattan Island, which had been destroyed by a sun bomb during the Holocaust nearly a century before, Government City occupied all but the upper three miles of the island, and the population consisted almost entirely of men and women engaged, either directly or indirectly, in the business of governing a planet. There were no shopping centers and no entertainment areas. The small personal flyer, almost the same size as the old gasoline-driven automobile, could, because of its inertia drive, move with the three-dimensional ability of a hummingbird, so the rivers that cut the island off from the mainland were no barrier. The shopping and entertainment centers of Brooklyn, Queens, and Jersey were only five minutes away, even through the thickest, slowest-moving traffic. It was the personal flyer, not the clumsy airplane, that had really eliminated distance along with national boundaries.