[wavefunction]

I think it would depend on what you're defining as 'that city.' If you mean the legal entity that enjoys tax revenues then yes, but for the people already living there they won't be getting those $100,000 Amazon jobs. So that means a bunch of people from outside the area suddenly moving in with a lot of money to throw around.

Sure, there will also be network effects where service level jobs expand but having been priced out of their former neighborhoods, watching people with perhaps little respect for the local culture or history coming in and changing things, I don't think the prospect of Amazon's new HQ is really all that positive for a city struggling as you hypothesize.