[whycombinetor]

I'm sure they would argue that the primary impact is higher prices (of housing especially), not higher salaries and tips. If you have a few new high income people come into a neighborhood, that feels like some extra dollars coming into the neighborhood; but if a large enough portion starts to become high income transplants, suddenly the locale starts catering to high income as the median consumer target, and previously-middle income workers are now relatively low income.