This game already has obscene levels of verticality, a great asset which truly sets this game apart. However, there is a way you can take it just that extra step further.
You already establish that the wealthy live in the echelons - high above the ground and away from the average joe. So, why not take this as a possibility of something to expand on - sky bridges, which separate the poor from the rich in an even deeper way.
These rich citizens are so high falutin that they refuse to even rub shoulders with their fellow citizen on the ground. They traverse the city exclusively by sky bridge, connecting the highest rises to each other at a second level.
These highrise bridges would have less of the Starch Cola presence - after all, if you can pay, you can make it go away. It would have beautiful lighting, security, maybe even some small businesses like newspaper stalls which sell the news from an angle directed at the upper class.
I was just trapped thinking on the angle of these people being so high up, they don't even know what life down below is like any more.