Why need any country boom just because South Korea does? Also, wouldn't the fact South Korea is capitalist (once it was) mean that it was going to boom (comparative to North Korea) almost inevitably?
True. Then again, Taiwan's economy boomed and there are people out there who believe that it is due to Feng Shui (even though I think it was because Japan already built up an economy in Taiwan, whether or not it was a secondary economy to Tokyo's).
As for a South Korean economy that goes bust - have Syngman Rhee and his cronies live on
just a bit longer, embezzle more money, and just destroy the economy.