in this context Silas is using pump in a slightly more general notion of a metaphorical pump, in that one can pump money or other resources away from someone.
That seems suspicious to me. Granted categorizations are imprecise, someone extending a word's meaning to a borderline case that has heretofore not been referred to by the term because that case is less problematic might be trying to sneak in the more problematic connotations.
Even when the word had already covered that meaning, using a word gives an impression and sets one up emotionally for an average use of it.
E.g., someone saying "Let me tell you about a famous war criminal of the twentieth century," who went on to discuss former President Cli...
http://eternal-earthbound-pets.com/Home_Page.html
Providing assurance that pets will be provided for in the event of Rapture.
Having thought it over, I'm OK with the ethics of this service.