There are shades of nationalism; I assume parent suggests multinational corps aim for a region in this spectrum - a region, in which movement is restricted, so that workers from poor country A don't migrate to richer country B, but where trade isn't restricted, so nothing stops the multinational to sell products made in A to people in B.
All nations have immigration controls, most of them strict, and the majority of most economies - even Western economies are protected (Banking, Telecoms, Entertainment, Agriculture, Energy) and even those that might not be technically protected are de-facto protected by business or political cabals. Try and buy a major Japanese auto company and see how they handle that.