Nobody gets Away. Ever.
The government cannot possibly enforce their rule against widespread resistance. They just don't have the manpower. So they rely on the fear/compliance of 99% of the population, and come down hard on the 1% who are not cowed.
- The Nazis in Germany had the Nacht und Nebel decree (literally night and fog, perhaps idiomatically cloak and dagger). It meant that the relatives of a prisoner would not be informed of their fate. Your UFS may or may not subscribe to the same doctrine, but they will not want people to get away uncontrolled and tell stories.
- In the same vein, Germans who got out of early concentration camps (those in '33 were quite different from the genocide camps of the war era) had to assure that they'd keep quiet about conditions.
It could be that they are thought to be bringing manuscripts out of the prison. The Russian term was samizdat (literally self-publishing). There could have been a "powerful" poet, writer, or philospher in the Falklands who is thought to have written something. It may or may not be true that they had it, what counts here is what the UFS thinks they had.
The problem with this is that the damage would be done after the refugees cross the line. An assassinated messenger should be almost as good as one who can testify to the veracity of the manuscript.
So probably not.
Even a fictional totalitarian state should have the usual internal strife. Part of that are several internal security organizations which watch each other, and try to score points against each other.
A bit like Nobody gets Away, above, except that the target audience are the other intelligence agencies and the President. "The main administration for camps and detention is an efficient agency and the chief administrator would be suitable as the next Secretary of Security."
Or perhaps there had been a prison riot in a camp in Texas last month that required the mobilization of the National Guard (and hence public announcements), and yet another public failure might sent the chief of camps to the camps himself.
I like the third one best. Drive home that it isn't about the characters, really. They are little pawns in the power play of faceless agencies and their remote bosses. They were pawns when they were sent to the Falklands and not stood against a wall, they were pawns when their escape had to be stopped at all costs.
Summary: The purpose of the camps is threefold:
- Support the image of an all-powerful state and discourage dissent.
- Extract maximum economic value from the dissidents. (Each camp has to show a profit, after operating costs are factored in.)
- Provide yet another disciplined, armed, barracked security force. (If the government ever had to fight a local police force, these people might be the available.)
Having escapees blab violates goal 1. So the chief of the camps goes to the chief of military intelligence and asks for a favor. The chief of military intelligence scribbles into a little black book and then nods.