I mean, it's kind of innate to the setting

Even now that they've stripped slavery from the setting (which, yeah, they kind of hand-waved away, but moving away from using slavery for shock value was a good move) villainous characters are always going to be motivated by giving themselves power

And in systems where power is tied to capital, that means the villain is ultimately going to be a Capitalist

Even the Whispering Tyrant is ultimately a Capitalist, because the bones are his money and worms are his dollars