Kansas, you are dead right, parasite is correct term for land agents..
they live off their hosts, landlord and tenant, until they are dead ,when they wriggle away to infest another host. They care not a jot for the long term viability of the farm or its occupants.
they engage in projects like tree felling, which will yield no revenue to the owner, but will give him a big commision..
they are the ones who oppose long term leases, as they are then redundant.
Patrick Sellar was the epitome of the cruel factor, burning houses with folk still in them during the clearances.
He had arranged to lease the land himself for sheep, hence the haste and brutality of the strathnaver clearance.
We in britain still work under land tenure more suited to the time of robin hood.
If you go back to your forebears, most of them left britain for the states to escape the agents, the rack rent, and the wholesale theft of improvements.