> That's the cost of being economically successful.
This is a cost disproportionately borne by low-income renters currently living in a city. If they have a choice, why should they pay it?
> That's because there is more competition for workers which drives up salaries, and for living spaces which drives up their cost.
Amazon workers will always outbid locals for housing. Unless 50,000 housing units will be built in the next few years (Contrary to the interests of property owners), this will reduce the quality of life for people not working for Amazon. They'll get to enjoy higher rents, longer commutes, and smaller disposable incomes.
People getting gentrified out where they live rarely benefit from the more competitive marketplace, or from coffee shops selling $14 avocado toast.
Adding jobs to an economically depressed area, with a surplus of housing benefits most people living in it. Adding jobs to an economically vibrant area, with a shortage of housing harms most people living in it. An Amazon office in Detroit would be great for the city. An Amazon office in San Francisco... Not so much.
Disclaimer: I don't live in Philadelphia, so I don't know where it is on the spectrii of 'economically vibrant' and 'housing shortage.'