The top line of what you just linked me is saying they’re going to drop property taxes on occupied buildings by 17% and raise taxes on unoccupied land. This isn’t about changing the math for renters this is about shrinking the city’s sprawl to save money on infrastructure.
And that’s not to say taxing landlords is going to do anything. My point is about the political economy of going after people whom you give half your money for years and years first (for centuries). Our political system is designed to protect these people. From the constitution on down.