That laborious activity is what is needed. Corporations don’t need prop thirteen. An heir I’m more neutral on. Like the housing authority starting the thread, is the problem less than 1% of owners or 30% of owners?
As for non principal residence, I think those impacts would actually hurt the 99% more than it would benefit them. It would severely impact the rental market quality and availability and I doubt it would lower sales prices as the homes. Net result, desirable areas would become even more income elite with even fewer rentals.