Example: https://www.propublica.org/article/when-private-equity-becom...
Also Adam Smith has a lot of rants against rent seeking behavior and landlords if you want to go with that "communist" writing.
> The rent of land, therefore, considered as the price paid for the use of the land, is naturally a monopoly price. It is not at all proportioned to what the landlord may have laid out upon the improvement of the land, or to what he can afford to take; but to what the farmer can afford to give
Funnily enough, check how far back the 1/3 income for rent comes from and the context on which it is mentioned:
> The rent of an estate above ground commonly amounts to what is supposed to be a third of the gross produce; and it is generally a rent certain and independent of the occasional variations in the crop. [..] This rent “is seldom less than a fourth ... of the whole produce.”