So let me tell you some rudimentary facts about the City economy. If you check the archives of my blogs you'll see that I've written about how money cannot survive technology. Because of the counterfeiting and identity theft and what not that will only continue to get worse as technology progresses into the future.
Man must learn to adapt his society to function without money of any kind. This is Messian Utopianism. This will be the economy of the City project however I am a realist. Money will always be present outside of the city. The outside will cling to money for dear life and when the reality sets in they will use gold. The City will rid itself of all money so technology can flow freely while on the other hand the outside will turn to totalitarianism to suppress further technological development so as to preserve the existence of money. After all Jesus did say you can't take it with you didn't he.
The City economy will not be centrally planed at least not any more than it has to be. When you come to the city you will have to find a work function and apply yourself to it. If you don't you can be thrown out. You must identify something that people want or need then provide it by giving it to them. Just think of the goods you produce as the money. Everyone must produce something and provide it to all who want it without the exchange of any money and without exception.
Just think of the city as a big bee hive. You produce your part of the needs of the city and how you are paid is by having access to what the city produces. It will be the same for everyone. Or for another example this is why this project is called a company. Corporations exchange goods between divisions all the time. They may note the books but their is never any actual exchange of money.
Since how their will be no money in the City then it cannot be used for incentive for greater achievement. Housing will be used for this function instead.
So just how could such an economy work? Well the first thing you must do is believe in it. The participants of any kind of economy must believe in it or it will never work. Take money itself. It is worthless pieces of paper yet it has value because you believe it does. It will be the same for this economy. Improving technology will make counterfeiting impossible to control. We have no choice but to make it work.