In addition, well-off people are interested in making sure their kids get a good education. So maybe they start pushing the city to improve public education. In addition, the increased home values and increased businesses are likely to result in greater increase in tax revenue, allowing more money to go to education.
And the nice part is that Gary, Indiana got these benefits without having to try to bribe a large corporation to open an office with tax giveaways.
You may or may not have more inequality, but I would argue that the people in Gary would be better off.
I know people in the Bay Area who are worse off now than they were in first dotcom burst because while software engineers might make 300% now of what they made in 2002, an auto mechanic doesn't. For many, wage growth didn't even keep up with the cost of living.
I think the most absurd thing that is happening is the high rents and low quality living standards that people are putting up with because of the companies that they need to relocate for. And the havoc they produce for the needed locals who can’t afford to live where they have been working all along.
If people in Gary Indiana get these jobs then the local economy would go up for the rest of the people.
Humans are social animals and I think it's common for people in privileged positions to want to associate with others like themselves.