To be honest, everyone who wants to make one global system scares the hell out of me. Especially if it's mixed with some algorithms will decide what's the best for you mumbo-jumbo. Go ahead and build your futuristic city, but I will opt-out from living there, sorry dude.
You live in a current global system already, made by people a long time ago. At the moment we have a good technological progress, so why not to try to do something new and discover new things by gettting out from old system to a newer one?
Economy are only controlled by few maybe crypto currency be a paradigm to change how we look at our monetary system which is now very corrupt in nature it might be the time when we can optimized our world resources that would result to even distribution of wealth among human. and would acquire cheaper health services with the development of technology higher standard of living among all.