Well, here is the thing- our cooperate overlords have created the perfect system to shirk regulations by shifting production to whoever is the most desperat.

My money is not on goverments or companys here. My money is on some plague drastically reducing the number of humans capable to produce carbon dioxide. It looks containable now, but contain something like Ebola with millions on the move and the UN-Institutions collapsing under this circumstances.

You can not enforce quarantine, if a whole country decides to walk.