Venkatesh Rao

MMC: Mansions, Mobilitarianism, Caves of Steel. This world could really work, and what's more, would make a great near-future setting.

Mansions: You get more rights than traditional property rights, but you pay LVT based on option pricing (ie anyone has right to buy your land at a value set by the tax you choose to pay. If the rate is 10% and you pay $1 pretending the land is $10, I can buy it off you for $10.01

Mobilitarianism: Open borders, everywhere except at city and mansion limits.

Caves of Steel: Asimovian cities that are so high-tech and constrained by regulations, you need some training just to live there. Funded entirely by mansion LVT and entry/exit taxes. Pay-to-play. Anyone can enter by paying the floating fee, but inside, food and shelter is free.

Now this would be a fun world to live in. Also there would be robots. Lots of robots. Mansion LVT would be enforced by Skynet-controlled force.

If you buy a mansion, you get to be called Baron. If you don't pay your LVT after 3 warnings, EMP burst cripples your mansion, the robots march in and toss you out. Then it's auctioned off. ex-Barons pay higher entry taxes into cities, but there's no jail.

The clever thing about the MMC world is that it is the people who agree to mutualism who are confined into closed jail-like civilized spaces (mansions or caves of steel). The rest of the world is a hobbesian Mad Max hinterland. Radical freedom as the ultimate jail.