It kind of makes sense they're geographically pretty close?
If you were going to start a tech company in 2010, why wouldn't you build near other campuses ? Hiring etc would be so much easier. You'd be at a disadvantage to be in another part of California?
The people they can easily pander to don't, for various reasons. Public education has been widely dismantled, especially in areas hit by industrial and white flight. Hookworm/malnutrition/lead poisoning are all also legitimately a hell of a fuckin drug.
The biggest charade of the past 50 or so years has also been convincing a decent portion of the U.S. that California is some democratic/liberal orgy of a state. It's not. California has historically had and still does have a large republican presence.
Sheer ignorance along with cognitive dissonance makes grifting easy as hell.
Businesses care about things other than low taxes. Hiring well educated and talented people is certainly top of the list. States that want to grow their economies should focus on making attracting/maintaining/developing those types of people. That means focusing on livability (livability != low cost of living).