The problem we see when we try to implement price controls is that they inevitably lead to shortages. The oil caps in the 70s are a famous example but the NYC rent controls were just as bad. The standard practice if you wanted an apartment was to look in the newspaper for open house listings that day. You would show up before the open house starts with at least 1 months rent plus first and last months rent as security deposit, in cash. If you liked the place you signed within the first half hour. If you waited someone else took the apartment.

Part of the challenge is that it’s not as simple as a 10% profit cap. What if someone owns a house for 2 years? Do we cap it at 20% profit? Do we index the allowable profit to inflation and then add a “reasonable” offset? Do we want to allow different profit caps for different renovations? (maybe we don’t want to treat swimming pools and solar panels the same way?) How long do you need to live in a house to consider it owner occupied?

As those regulations get more and more complicated you end up with a ton of loopholes. The more you do that the more profitable regulatory arbitrage becomes as a business model.

In general, tight margins favor large companies over small firms. They can operate at such a large scale where they can thrive off of profit margins that would starve small businesses. That’s the general issue with mega-retailers. They operate on single digit margins. Mom and pop can’t streamline their operations enough to survive on those margins.

Our housing stock needs both growth and maintenance. That comes from investment. If we push the private sector out of those investments without replacing them we’ll just end up with a crumbling housing infrastructure. If we cut large businesses out of it government would likely need to take up the slack. And to be clear that government intervention would need to be massive. The real estate market is huge and if we cut out the private sector we will definitely need to raise taxes, by a large amount, to cover it. That’s not off the table but we should walk into a decision like that with eyes wide open.