Look at how West Germany is still having a hard time with East Germany and they were the most developed (supposedly) socialist economy in the world.
So status quo favors the crazy North Korean dogs.
....South Korea does not want North Korea to fall apart or it will become unmeasurable burden on their economy.
I see similarities with the Mexican non-economy and the United States. I wonder at the effect if the hard dollar currency being sent to Mexico from illagals and legals here was stopped.