Because people want to STAY in USA, Australia and other first world countries...Can you tell the same about your country? "NO WAY!" πππ
You've heard the expression "Nice place to visit but I wouldn't want to live there" .... π
Money...it's always about money. Straight guys sucking cock, money...killing people, money....getting sex, money. Allowing people that will spend money into your country, money. Allowing poor people into your country with no money, NO WAY!
From the markets I fly from, GRU is almost always cheaper. I Fly Star Alliance because of status and will book Azul airlines for national flights.
Or sometimes I'll book an open jaw which is into Rio and out of SP, or vice versa...then only have to buy one domestic flight between the 2 cities.
That would probably happen if you said that anywhere in the USA too...more out of amazement than not knowing where it is.....well, that could happen as well.π