If I'm not mistaken, Rio has the largest fleet of civilian helicopters in the world. A large percentage of the population that is affluent will use the charter helicopters as someone in New York City would use a taxi.
Most of the high rise buildings have a landing pad on the roof and many people will fly to work from their rooftop and go the whole day without being out on the street.
I met a police officer from Brazil when I worked the 96 Olympics; he said that kidnappings were very common among the middle to upper classes. It was very hard for him to conceptualize anyone that would drive about in a BMW / Mercedes / Porsche, etc without it being armored. As bad as Atlanta was, and is, we don't know how good we have it.