I don't think we're saying the same thing, but rather speaking past each other. I think I need to dissect these two parts of your original comment:
> What worries me is California refuses to raise property taxes
Sure, if you're trying to increase taxes somehow, then the proposal in your reply could be one way to do it, and it sounds less painful than increasing everybody's property taxes. That logic isn't what I have issues with, since you're just comparing different ways to do property taxes regarding primary residences. (This isn't to say I agree or disagree with it.)
> Raise property taxes because without it, your income tax will have no upper bound.
This is the part I took issue with. It appeared you were trying to motivate property tax increases by arguing income taxes are an obviously worse way to make up for them, but... why? I didn't understand the logic behind that, and that's what I was asking about. If I'm a policymaker trying to choose between increasing income and property taxes, why should I choose property taxes to be the one to increase?