Interesting. Perhaps David Eduardo has some insight into any Radio Nacional political controversy, having worked in Argentina.
I was only involved in day-to-day radio operations in Argentina for about 7 years. In that period, the government station had few listeners and no influence. Of course, during various totalitarian governments media was forced to follow strict guidelines.
Similarly, in my near-decade in Ecuador, the influence of Radio Nacional was minimal. Nobody listened.
The real issue there and in other nations of Latin America is the government control or threat of control when there were "incidents". In Ecuador, if there was any kind of protest, the government sent police to sit in each studio to make sure nothing improper was said.
If a new government took over after a coup d'etat, usually all stations were required... for hours or days... to rebroadcast Radio Nacional or a feed from the HQ of the new government.
Of course you see this sort of “defund” argument in other countries. There are voices out there that would do away with the BBC, CBC, and Australia’s ABC.
In the free countries of Latin America, government radio has little impact. Mexico does not even have a national radio voice, although a number of the states have networks that would be a bit like the wide coverage of the NPR affiliate in Minnesota with lots of local news coverage. Several government departments or bureaus in Mexico have stations, such as one that specializes in serving the roughly 120 different native language and dialect radio services. Many state universities have "autonomous" radio voices that carry the spirit of university campus areas being "sovereign".
The more totalitarian the government, the more it controls radio. In Cuba, all radio... over a dozen national and regional networks... is run by the government. In Nicaragua and Venezuela, nearly all truly independent news voices have been closed or taken over by the government. When "Pineapple Face" ran Panamá, in one case with a group of stations that opposed his government, he ordered all the staff out of the building and set it on fire, wiping it out entirely.