And many if not most of those will then try to make it through China and Laos into Thailand to seek asylum at an embassy in Bangkok. The wife and I personally saw one group of escaped North Koreans – about five ladies, IIRC – hustled off a bus in Thailand’s Chiang Rai province, which borders Laos. Don’t know what happened to them. But the authorities up there are always watching for North Koreans.
I have read somewhere that that attitude is well-established and open among much of the younger generation in SoKo.
Fun with maps:
The North Korean border with China is much longer than the one with South Korea. This isn’t checkpoint Charlie. The border Russia OTOH is tiny - only 17 km wide.
Map of North Korea
North Korea–Russia border - Wikipedia
To answer the OP: the world community should stir the pot. Pressure the Chinese government not to repatriate North Koreans back: ship them to South Korea instead. No, they won’t go along with that. We should advocate that anyway.
A crazy billionaire should endow an institute in the Cayman Islands for washed out dictators. Just check your weapons at the door: coups may only be conducted on alternate Thursdays.
In other words we should move our pieces into place in preparation for the moment when opportunity/crisis arises.
Economic cataclysm: yes. North Korea has a population of 24 million compared with South Korea’s 50 million. That’s a bigger fish to swallow than experienced by Germany (16 vs 63 million). And the cultural/economic gap is bigger in Korea as well.
Okay, that is a possibility. But realistically, what do we (or anyone else) offer China that would be sufficient to cause them to drop their support of North Korea? Sure, we could do it - if we offered China a free pass on invading Taiwan, for example. But that’s the problem - the cost we’d pay to get China on board with this would be unacceptably high.