The word "consume" is important. Billionaires might own a million average family homes, but that's not the same thing as actually using the home. A normal famil

The word "consume" is important. Billionaires might own a million average family homes, but that's not the same thing as actually using the home. A normal family will eventually lease the house and use it, unless it's left vacant. I'm not sure vacant property investment holds up in a world with radically higher numbers of houses getting built. The billionaires either stop investing and let house prices drop, or they keep investing until they run out of money, at which point they have no choice but to stop. This only holds up for houses themselves and not for land, but hey, you can solve that with a land tax.