First of all, why would an authoritarian government want an impartial moderating office for media in their country? If anything, I expect Pakistan to soon demand government control over censoring Twitter, not the other way arpund.
Second of all, Twitter is a bit player in media. Comparing it to McDonald's is absurd. If we were talking about Facebook, this may be a different matter.
Third of all, government relation to media is significantly different to government's relationship to beef. There is no government in the world that wants a bad beef industry, but many many governments that actively want a biased media industry, and are more than willing to sacrifice monetary concerns to achieve this goal. Countries much smaller (at least in population) than Pakistan have actively kicked out platforms like Twitter - see Russia for example.
I will say it again: it is not realistic to expect a foreign media platform to fight government propaganda inside an authoritarian country. Twitter is not the BBC or Reuters, and even those places don't often try to publish in authoritarian countries.
