Well yeah, but you actually need cattle and have them graze there, or build factories, employ people and produce stuff there, so if bezos buys a plot of buildab

Well yeah, but you actually need cattle and have them graze there, or build factories, employ people and produce stuff there, so if bezos buys a plot of buildable land, he would get a 5 years (or whatever) time limit, to actually build and produce something there, or be forced to sell. If someone just buys land, and hodls it, without actually producing anything there, a 100% tax rate would solve a lot of problems.