The point is there exists a tax you have to pay for simply owning something (although the tax rate is not 1 to 1 with market value in many places). So now we are just talking about applying to other equities like stocks.
> In California, effectively the longer you've owned the property the less you tend to pay as a fraction of the value, which in a sense is regressive because younger, less affluent homeowners pay more tax.
For sure, it is remarkable how many ways US society screws young people (fewer voters) in favor of the old (more voters) once you start looking. And in California, it is remarkable how explicitly they screwed young people with poorer ancestors versus young people with richer ancestors.