1) The data is from the FBI.2) I’m confused about the sentence where you said “Higher taxes = … = less tax money for upkeep of infrastructure”.3) You forgot to mention that insane housing prices and wildfires and droughts are also contributing factors to the depopulation of California.4) You can have high taxes and not become run-down crapholes like Detroit. Singapore, Japan, and Denmark are some good examples.
I see. In a non-unitary country like the U.S., people would just move to other states with lower taxes.