They pay the lowest taxes because of Prop 13, and it’s hurting the cities’ finances. Most of these houses are the “dream homes” to which these families aspired, so they bought them with the intention of staying in them indefinitely. After all the appreciation, they’d be fools to let go of these homes with their Prop 13 tax rates, so they (and their heirs) stay. Many of them are paying lower property taxes than people who live in Vista, Oceanside, etc.