I have seen a few of these with similar story lines and realized we are living it right now. They have the best healthcare, the best food, the best everything and most of us are a few dollars from disaster. That scares some of us to death literally from all the stress it causes.
There was a point, around the end of the Gold Rush and the beginning of the Industrial Revolution, when they were still building that floating city, that the common man could work his way up and get on it. Unfortunately, as time has passed and conditions have changed, the floating city is now all but completely out of our reach.