The housing crisis will never end without levying forceful taxes against real estate speculators and investors. A recent report outlines the necessary actions to impose taxes that can actually narrow the wealth gap and alleviate the housing emergency.
I don’t think you have put any thought in to this. How would that solve anything exactly? If you taxed rental income at 110% then nobody would ever be a landlord, and all existing landlords would evict their tenants immediately, leaving millions homeless. Do you just want a system where you can only live in owned properties and renting is forbidden?
Note also that I want to tax all non-resident properties at 100%. There’d be a lot of homes to go into.