Do you really believe they will collapse a system based on past results?
Not just in America, but using world history as a guide there will be a war to prevent a collapse.
As you said, south korea and japan has half of America's manufacturing jobs. China has the other half, they will allow a war on their border with North Korea this time, which will destroy south korea and japan to bring back jobs to America.
The last korean war China did not have any of America's jobs, it didn't like a war on its border.