So I'm currently developing the setting for a Sci-fi story set in the distant future, and I'm pretty interested in the idea of corporations ruling cities and having no central government. For example, a corporation that purchased NYC or Chicago would now own the people, the businesses, etc. and with no government to report back to/orders to follow, that company could change it and mold it however it pleases. Of course, the corporations are now responsible for everything the government used to regulate. However, I'm kinda at a loss as to if my portrayal is realistic. The way I envisioned it technology kept advancing and giving several corporations more and more economic and political power to these corporations to the point where they were more powerful than the government itself (money is power type of thing). I figure there's probably something I'm missing here, but I'd really appreciate any type of advice or just a fresh new perspective on this. Thanks, and sorry if my writing was kind of choppy.