Slightly off-topic
For those who do not know it, I absolutely recommend the documentary "Fuerza aérea SA" which shows the deeply entrenched corruption, negligence and mismanagement in the
argentinian air navigation.
Seems to me Brazil wouldn't be too far away from that.
Here is a link to the movie (in spanish, sorry, but I'm sure there are a english translations)
YouTube - Fuerza Aerea SA parte 1