 What might the story be trying to point out?
He was a captain of guards in Estates-General Correctional Institution—better known to its inmates as the Jug—and if he hadn't been able to detect the scent of trouble brewing a cell-block away, he would never have survived to reach his captaincy. And, what was more important, why she couldn't adjust herself to it, now that she was in. It said in the Civil Service Guide to Prison Administration : "Detainees will be permitted to speak in their own behalf in disciplinary proceedings." And O'Leary was a man who lived by the book. That old witch Mathias never told me I was supposed to mop up. If you didn't understand what Mathias was talking about, you should have asked her. He had managed, by strength of will, not to hear that she had omitted to say "sir" every time she spoke to him, but he couldn't keep it up forever and he certainly couldn't overlook hysteria. He handed the rap sheet to Sodaro and said absently: "Too bad a kid like her has to be here. Captain O'Leary took a long drink of water from the fountain marked "Civil Service." The direction of evolution is toward specialization and Man is no exception, but with the difference that his is the one species that creates its own environment in which to specialize. From the moment that clans formed, specialization began—the hunters using the weapons made by the flint-chippers, the food cooked in clay pots made by the ceramists, over fire made by the shaman who guarded the sacred flame. From the born mechanic and the man with the gift of gab, society evolved to the point of smaller contact and less communication between the specializations, until now they could understand each other on only the most basic physical necessities—and not even always then. But this was desirable, for the more specialists, the higher the degree of civilization. The ultimate should be the complete segregation of each specialization—social and genetic measures to make them breed true, because the unspecialized man is an uncivilized man, or at any rate he does not advance civilization. And letting the specializations mix would produce genetic undesirables: clerk-laborer or Professional-GI misfits, for example, being only half specialized, would be good at no specialization. And the basis of this specialization society was: "The aptitude groups are the true races of mankind." Putting it into law was only the legal enforcement of a demonstrable fact.
 It goes against human nature to try to segregate people, no matter how it's done.
 A society of specialized people would be incredibly difficult to manage, and ultimately inefficient.  A society of specialized people would be incredibly difficult to manage, but worth it for the work that would get done.  People will always try to rebel against the system, no matter what form it's in.  It goes against human nature to try to segregate people, no matter how it's done.