What better way to find out whether or not this is true than with a real experiment? This is a fantastic idea, because we could see what alternatives actually look like. If you don't want to live there, you just simply don't live there.
We've done both experiments already, and we should learn from the extant data rather than repeating unethical experiments.
I realise that a lot of modern tech culture would rather re-invent the world from first principles while making 10,000 years of human mistakes at high speed in preference to acknowledging the existence of disciplines outside of STEM, but history, economics, anthropology, town planning, they're all right there with many of the answers.
Modern federal and state law already effectively prevents the worst sort of abuse that employees had to deal with in the worst company towns of the past, so I don't foresee the same kind of exploitation happening.
Sun City, Arizona is also a good example.
Gurgaon ,India - but note there are private (company) areas and public areas. In fact that may offer a nice comparison, but from my understanding the seed stage was 100% company-backed.
The Woodlands, Texas. https://en.wikipedia.org/wiki/The_Woodlands,_Texas
I think Ciudad del Este gets pretty close although thats a FTZ charter city, not exactly a "company" charter city.
When you look at these cities you need to select local comps that make sense.
Robocop 2 https://youtu.be/wA_P8CaNwro