> you must also regulate the sort of vehicles ordinary people can buy and the sort of homes they can own.
Yep, we already do that. Vehicles and houses have to conform to a set of standards that provide security and safety measures for others, e.g. "Street legal" car restrictions, fire hazard safety requirements and building permit regulations and state codes that adhere to city guidelines, etc. Might need to include a few more talking points from the political pundit you're regurgitating views from for a better argument.
> If you do that, you must also regulate the sort of vehicles ordinary people can buy and the sort of homes they can own.
There are two provinces in Canada (British Columbia and Saskatchewan, since 1973 and 1945 respectively) who have a crown insurance corporation and require everyone purchase insurance through the government.
Even if the government ran the insurance program, you wouldn't be forced to charge everyone the same amount for their insurance. The Camaro driver could pay more for their coverage.
After all, we can't have the community suffer an unsustainable loss because some guy earned too much money and selfishly bought a Camaro.
So, obviously the collective should create a list of cheap and economical cars ordinary people are allowed to buy.
If that doesn't feel right to you, remember, the so called "freedom of choice" is a bourgeois value. Transcend it.