Yes - this entirely.
They live on what has since been appropriated (probably by default and assumption) as Brazilian territory; but they don't live in Brazil.
It's not a case of them wanting all the benefits of a society, but then also wanting to ignore the rules of that society andbsopt out only when it suits them; they have never been in any way part of that society.
They don't want the 'good' things of Brazil and they don't want the 'bad' things of Brazil; they simply are not part of Brazil, but they happen to live on land that has since been grabbed by Brazil - going by Brazil's desires and not by theirs.
Imagine it on a much smaller scale: if the people who lived in the house next door to you decided that your house (owned outright and completely paid for by you) should now be part of a commune, that just so happened to need to be ruled by them, with them making all of the decisions - including what colour all the walls must be painted, what you must all eat, how you must all dress, how you must speak and being up your children (exactly the same way as they already perfectly parent their little Jocasta and Tarquin, of course), what job you must do etc.
They may not be tyrants - they may be genuinely wanting what they assume to be the best for everybody and the lifestyle that (in their eyes) everybody should be able/expected to live.
Your desires and choices may be vastly different from theirs but - bless your sweet, funny little ways - they obviously know that their way is the right one and yours is thus automatically wrong. Are you seeing the issue now?