Unless you have found yourself working with a very peculiar group of people, you are being duped or just exaggerating to the point of being outright wrong.
It is absolutely not a custom anywhere in Brazil, not even in Rio, to be late (_at all_) for professional appointments.
_Especially_ systematically late that a "system" like that is put in place (and supposedly works). To be blunt, the idea that you could correct such behavior from professional adults by duping them with altered schedules is even childish.
If this is indeed the case, please post the name of the company so we can blacklist everyone that works in that office