You vastly underestimate the difficulty of immigrating to the United States (or even just _visiting_ it legally).

That really seems like something that can be figured out, especially if the result is 3x less in wages. Unlike immigrating to the US, which is sometimes plain impossible.

It is only worth it for companies beyond a certain size. Smaller companies will always opt for visas vs. figuring out remote taxes.

They don’t hire that Brasilian to be their employee. The Brasilian is a one-man company. They contract the company to render whatever service. The Brasilian company does whatever Brasiliantaxes and procedures are necessary.

I know a first-world company hiring third-world people. All the taxes are handled by the contractor himself. There are no legal issues to speak of, you only need an invoice from the contractor, or from an intermediator company, such as fiverr.

Interesting, what are they?