Actually, the exact opposite of what you said is the solution. Allow stronger property rights. Allow developers to build up using simple real estate economics - for residential and commercial projects. Rent control is the quickest way to turn one of America's best cities into vast slum.

I'm a commercial real estate appraiser. Real estate already has very low margins (10% - 20% for strong operations) - how do you expect the property owner to maintain the property (expenses, taxes, mortgage) and make enough of a profit to consider holding onto said property? Let's turn that around - you presumably like your job. Now, take a 40% pay cut - can you still afford to keep your job?