Why unify Korea?

Historically, Korea's biggest problem has been the lack of resources. Even today, the small population and very limited natural resources have stunted its growth into a real world power. If borders were taken down between North and South Korea, the population would nearly double, thus doubling its human resource factor. A country of 70,000 people would put it on more even footing with the 100,000+ population of Japan as well as the obvious benefit of expanding its territory and exploitable resources. With Korea's huge, newfound educated population, expansion of territory and resources, knowledge of how to expand economically, and eventual total control of the economy by big-businesses in Korea's group-oriented culture, Korea would eventually become a world power, most likely usurping the spot of either Japan or Germany amongst the world's top four economies.

Although it would likely eventually be displaced by countries with enormous populations such as Brazil, Mexico, or Russia and it is highly unlikely it will ever be able to attain the sheer force of the future economic juggernauts of USA, China, and India, a unified Korea would enjoy a short-term position nearer to the top of the economic ladder and possibly the most economically equal society in the world.

Obviously, this is good for Korea.