system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: North Korea seems pretty weak, why hasn't anyone toppled their government or declared war with them yet?
gpt
First of all there is China. They don't want US military at their borders. It won't cause WW3, but perhaps a proxy war..

Second problem is that NK is fucked. No country has money to fix it and no country would want to deal with refugees. People of North Korea are unskilled labour.

Third is "why?". Why would anyone want to deal with it? They are mostly harmless and destroying it or merging back with SK would create more problems than it's worth. There is little to no benefit, expect for feeling morally superior. No country is qualified to play "world police".