Of course these companies rake in cash, but this, at big tech TC this defensive tactic seems so expensive and wasteful... but thanks to you comment, I realize that is isn't really the concern or dynamic.

In "tech hubs" this style of staffing has really disrupted our local economies in ways that have been harmful to communities and made civic systems unsustainable. This isn't a "get out, tech bro" complaint - but a systemic recognition. Seems so pointless.