one, not just the US but the western world as a whole. South Korea is a export heavy market. But with close alliances across the west and east.
Two it would be a foolhardy to unilaterally cut ties. As it would be cutting off your own legs for little but promises.
3.2 Trillion dollars would probably not even start the conversation about a true nation rebuild of North Korea. A few years back NASA for fun assembled using satellite photos a night time globe. If you look at this globe made of millions of satellites photos and look to Asia you see a map of stars each star being lights from the ground. Street lights, homes, office buildings, cars. you could clearly see Japan as a blanket of stars, Taiwan as a blanket of stars, the cities of China mapped out in lights with smaller ones in rural China, south Korea mapped out in detail by lights and in the center of this Black. North Korea with the exception of Pyongyang a void like a black hole. Even Siberia was better lit.
The PRC has invested billions to try and establish a modern economic growth program with North Korea. But the North Koreans are just not interested, in forced reunification the cost of economic development for the North is going to be ringing in a lot more then anything the leadership of the CCP would be willing to lay down.
Phead, The US is not insolvent, she may barrow but she is hardly bankrupt the amount of income vs the amount of interest for loans in the US even with the Obama administration is still decidedly in the US favor. The US remains the top economy and is still capable of expansion. The claims of US bankruptcy are total bull. If they were true why would China be buying? Why would foreign investment still be active? Why would a number of Chinese billionaires have just invested in Detroit?!
oh yes the classic, Japan... Oh... The fear of Japan. Even if Abe were the Demonic nationalists Imperialist Hardliner plotting the conquest of Asia it be a pipe dream. The SDF has a fine navy, fare Army and good Air force but take a second look. The Japanese are aging. There population is falling, military budget is still only .3% of GDP. Every program that has popped up on the radar is not a major breakthrough but a replacement or upgrade, and for each other nations have more or less parity.
sorry but the threat of Japan is a old nightmare, the Bushido spouting Samurai sword wielding soldiers of the past are dead and dying. The book of Bushido is today a book of gulf scores and the Samurai sword is a cane. The remilitarized Japan is a nation that is more or less reactionary. The most offensive action a aging PM visits to a Shinto shrine, a action he actually held off on doing until his attempt at offering a hand to south Korea was answered with insult and his request at negotiations with The PRC replied with demands of surrender. So Abe did what you do when in that situation a political obscene hand gesture.
Finally if Korea were Reunited, The reunited Korean state should in my opinion move to Neutrality. Play at keeping both the US and PRC close but neither to close. A reunification if successful offers a possibility that Korea may become the next great Asian success story. Remember Germany was divided, one side highly industrial the other strictly limited. Reunification nearly bankrupting Germany in the 1990s, today Germany is the European powerhouse and its not all due to China. Establish its own Orbit not play to a others.
Whether or not Japan is still militaristic at heart or simply remilitarising as a reaction towards regional tensions is irrelevant. Regardless of the reasons behind her remilitarisation, her two (3) neighbours would still view the act with resentment; whether that's fair or not to Japan is your opinion. You may believe Japan is a benevolent country, but you're not the one ruling China, either Koreas or a potential united Korea. At the end of the day, Korea and China would still view Japanese remilitarisation with antagonism, it makes no difference what third-party observers believe of Japan.
What you think a united Korea 'should' do probably won't correlate with what they 'will' do. You are suggesting something that would be nigh impossible for a united Korea. The world's two major economies are the USA and China, and China is becoming more and more prominent by the day. A united Korea would be the ultimate and most obvious battleground for influence between the US and China, and there will be a winner and a loser. Whether or not a united Korea will choose to side with China or the US will depend on how large and influential China has become when reunification occurs, either that or China effects a regime change in a united Korea to place a friendly administration in power. Bottom line is Korea will not remain 'neutral'; as a newly reunited and social-economically polarised nation, united Korea would be vulnerable to many potential calamities. It is most logical that they would seek outside assistance whether it be infrastructure investment, loans etc.
I don't understand your bringing Germany into this debate. The analogy is not applicable to a united Korea. First of all, the gap between North and South Korea is several increments above that of the gap between East and West Germany; integrating North and South Korea together will be a MUCH more difficult endeavour. Second, Germany only has her own 'orbit' or sphere of influence because the countries around her are small and do not have a lot of influence themselves. Korea does not have that option; right on her border is an economic and military titan and right across the Sea of Japan is another economic giant, albeit declining. If anything, it will be Korea's neighbours who exert their spheres of influence on Korea, not the other way around. Third, wouldn't Germany's case work against your argument? United Germany chose a side; NATO and Western allies as opposed to the Warsaw Pact. They did not remain neutral, as a united Korea will also not remain neutral.