[syrgian]

Buy houses and lots, keep them empty, and speculate on their value.

Or just build their 6th mansion that uses a plot of land that could fit 400 apartments, keeping the people underneath them commuting 1 hour from their 80 square meter apartment.

[randomdata]

> Buy houses and lots, keep them empty, and speculate on their value.

But then the profit is given to whomever previously owned the property. What are they going to do with it?

> Or just build their 6th mansion

That puts people to work, violating the premise here.

[yowzadave]

You should familiarize yourself with the actual research on this topic, since ill-informed speculation on well-studied topics doesn't contribute to a helpful discussion. The subject you want to study is called "marginal propensity to consume."