the mechanisms will be the same as with any other deluded group of people thinking they are grown ups. China will not buy any of your stuff, the US will put an import tax, both will instead lure all of these "talents" away with more money, and them being "citizens of the world" they will relocate at the speed of light, having zero loyalty towards California whatsoever. You will run out of money, the social structure will collapse, all those "oppressed" lower class people will start the infighting and seek a strong person offering simple solutions to complex problems, then the civil war starts and at this point the US forces will move in and clean the place, out of pity probably. And that's the difference to African states.