I fully believe the North Korean military would depose Kim Jong Un in a heartbeat if he ever did any actions that would jeopardize all the sweet defense contracts, wasteful spending, and military excesses/comfortable lifestyles for officers and generals that they got going on in North Korea.
Most of the military spending are dedicated to preparing for war. Surely, there is a lot of pro-reunification of Korea in their military top management. Deposing the rightful leader of a country just after he DoWs South Korea would be hard to cover up for the people. But I think you are right in saying that, there must be a military caste "exploiting" this cold war by maintaining a very good lifestyle and would feel disapointed if they actually had to risk their lives, but enough to try a coup d'etat? Dont think so. Or would require a helluva good motive and back-up story for the masses (and certainly external military support to crush loyal factions).
All the rhetoric to the professional, military/ruling class of NK probably just means big bonuses to their paychecks and more money at their pet projects. Jong's father seemed to also understand how to get sweet Rhetoric 4 Cash from the west/China too by drumming up bullshit, backing down, then waiting for the international aid to help fill their coffers. Seems like his son is incompetent at being corrupt so far.
You score some logic points. But what about the international aid ? I think I heard they receive cash to help their perpetual famine state and/or something else (and international aid is famous for being easily rerouted to greedy coffers...), but except that?
Also being embargoed by most "democratic" countries in the world and having to deal with diplomatic and economical penalties should balance those aids from neutral NGO and friendly countries.
What I would like to hear on this thread is what happened between now and some months ago, and I mean not general media bullshit, but really detailed informations.
What I see on the television is always "north korea provocating" and "irresponsible missile test" etc...
Would like to hear South Korea/USA list of provocation and irresponsible military actions too... There is never only ONE guilty where countries are concerned.