What about real-estate? Theoretically someone could buy up every property in an area and then price gouge anyone who wants to live there. They "could" just live somewhere else that is cheaper.
I.e. the market, not a monopoly.
Tripling prices of TP so you don't hoard during a shortage seems less detrimental to society than locking generations of working class people from being able to ever join highly-productive areas.
This is why such attempts to corner the market fail. See Hunt Brothers.