It's not that simple, because up to some point, precarious work outcompetes non-precarious work, reducing the later one.
You will see all kinds of arguments and researches, but actually nobody is really sure about what that point is, and if it is a net positive or negative for workers. To make it worse, Brazil is in a kind of unique situation because official work is extremely regulated, while precarious work is well accepted and widespread (and not as new as you think), so one can not even apply the lessons from most of the world.
You will see all kinds of arguments and researches, but actually nobody is really sure about what that point is, and if it is a net positive or negative for workers. To make it worse, Brazil is in a kind of unique situation because official work is extremely regulated, while precarious work is well accepted and widespread (and not as new as you think), so one can not even apply the lessons from most of the world.