In my handful of years in the bay area I've seen rent controlled 4 bedroom apartments pass through chains of friends (usually alumni of the same university) several years in a row. Most of these tenants have been well compensated tech workers. I think price control without regulating who can access lower controls can increase inequality. Something I have observed anecdotally to work is fixing a percentage of units to be reserved for low income people. It's a nice way to let us tech workers subsidize the less fortunate and still allow landlords to make money.