Timeframe too. Are they not yet out of the hard times phase? The idea I think fits into the wider complexity that is life—those operating in the hard times regime are burning a wick that eventually runs out and the situation becomes intolerable or non operational. At which point strong men step up and say “to heck with this I’m going this direction” in the ensuing anarchy and try to erect some degree of order in another direction.
In the complexity of life we can only afford so many mistakes before they take a toll and opportunities become squandered and one is effectively outcompeted. It’s like a sick tree, once under assault nature has creatures that read the signal, insects bore into the wood, fungus finds a home, slow rot begins. All the while the tree still stands, but eventually the strong winds come and in that condition the tree gives way. What precise balance North Korea sits at with their cohesion is probably not known, even by them, just guessed at.