People and corporate entities do not truly own land. That is a convenient illusion and a rhetorical trick we endure for perhaps no other reason than the momentum of precedent.
People and corporate entities rent land from governments and we call the rental rate 'property tax'. Furthermore, eminent domain is in part meant to defend against adverse situations of the kind you're describing.
IP law is designed to prevent indefinite squatting.
Not sure what practical difference that makes except in extreme circumstances like war. At an individual level government interference with your land
can be devastating. But in general land owning companies pretty much own that land. The government bit is a technicality and some tax.
People and corporate entities rent land from governments and we call the rental rate 'property tax'. Furthermore, eminent domain is in part meant to defend against adverse situations of the kind you're describing.
IP law is designed to prevent indefinite squatting.