HQ2 is a great case study on why we ought to have the Land Value Tax. Under this regime, wherever Amazon chooses to put their HQ would have all the same market mechanics occur (prices would still rise with the market) but the increase in prices would be seized as tax revenues and not as a windfall for landlords who had nothing to do with why Amazon chose to put HQ2 there. The region could then use this to e.g. build public housing, improve infrastructure, create functional transit hubs to allow people to disperse a bit while still remaining part of the community, etc.