First of all the whole super city idea is like the most shameful attempt to get attention by political leaders, it's just stupid.
A New Zealand "super city" is like a wart comparred to other world powers. Main export is sheep wool and Maoris and Samoans who actually the only community organizers. There is no direction by national party other than look at me, I built a building that you overseas powers can now buy, come over here, looky lookat what we can do..it's called "super".