[zanny]

The buying up and hoarding of land and property is just one symptom of broader wealth concentration into the hands of global elite. Like you said, its universally bad, but when you have so much wealth (on a macroeconomic scale) and nowhere to in the immediate term invest it to produce reliable returns, you instead towards hoarding scarce resources as a store of value - gold, land, and essential crops and anywhere else you can trade fiat / volatile stock into less risky properties.

China has gotten very rich in the last twenty years, but it has been nothing close to an equal rising tide of prosperity. There are now uber-rich competitive with the greatest dynasties of Euro-American enterprise that want to do something with all that wealth, and particular relative to the West they have a problem with their stock market being heavily state controlled and thus an undesirable place to safety hoard capital.