Here's a blog post from Charlie Stross back in 2010 comparing corporate rule with the aftermath of being conquered by non-humans. (And Krugman saying that it's not necessary to posit non-human conquerors when plain old human sociopaths are a sufficient explanation.)
So - I know that this is mostly a conceit, sure. But it's one that I find fascinating, and the comments in that blog post really need to be mined for pointers to related serious work. So consider this a to-do.