The thing is despite the very loud whining about it they don't really need low taxes or loose regulations. That is the pony for a little girl essentially. It might make them happier but it isn't what they need at all. If that was really true then we would see corporations setting up in unincorporated areas. Instead basically nobody does that now.

What they really need are good services, an educated workforce and a place their workforce wants to live.

Elites need the high end of resources for the winner to take the lions share - otherwise they would be one among many and not elite because many can do it. In this case talent is the resource they must seek.

They tend to want to live in an area with plenty of alternative jobs and like minded people. Those two tend to self perpetuate. Since demand is high and working in a hot area is good for advancement, makes them look good and helps boost salary expectations combined with a desireable place to live the demand stays high unless it is a bubble and it bursts.