Most of the residents you are talking about were "invaders" one time too. The difference is that when they showed up, more housing was built for them.
Today, more housing does not get built, primarily because of strict zoning laws supported by the existing residents, so newcomers end up competing with existing residents for housing.
On the other hand, if new housing was built for the newcomers, they would contribute to the economy of the city and pay taxes, and their presence would be an overall net positive.
Something is really wrong with the way a city is run if an influx of high earners is considered a bad thing.
Today, more housing does not get built, primarily because of strict zoning laws supported by the existing residents, so newcomers end up competing with existing residents for housing.
On the other hand, if new housing was built for the newcomers, they would contribute to the economy of the city and pay taxes, and their presence would be an overall net positive.
Something is really wrong with the way a city is run if an influx of high earners is considered a bad thing.