There is something subtly wrong with the world as presented in that "documentary" in general it is that somebody has to keep the lights on, the machines running, that is, there is too much working infrastructure for the citizens ability level. I suspect the big corporations maintain a hidden educated population and are happy to run the world from the shadows.

Now honestly it is just a goofy movie premise, and we should not look too far into it, but sometimes it is fun to go full nerd.