@pluralistic

Parasites infect both healthy and unhealthy hosts.

They alter their host organisms to suit the parasite.

https://www.snexplores.org/article/parasitic-worms-alter-body-inflammation-immune-system-treatment

In another example, vampire bats have similar strategies as hedge fund managers, of "feed & fly off".
https://en.m.wikipedia.org/wiki/Vampire_bat

Although in the case of Chris Hohn, it's more "feed & eff off".