Watching from Spain, what do you mean "vote and live exactly like they did in CA"?
Here in Spain more and more northern europeans come. I guess many of them are going to settle here (I get lots of questions about taxes and dealing with the spanish state, candid souls), so they contribute to the housing problem but I don't really see what they might import here that can worsen the situation besides their purchasing power.
Also, being Sillicon Valley one of the most productive places on earth, why companies don't involve themselves in politics about housing and city planning?
If I was some top head in such companies I woudl definitely consider it, as it goes directly against my floating line. If I manage to convince mayors that copying the netherlands onto the land around my offices I wouldn't need to pay so much and my engineers would be happier anyways.
They are basically swimming in cash, so IDK, they are involved in politics anyway...