I'm confused. I thought "pump" was a word used in dutch-book type arguments, where (to continue the analogy) the guy wanted to sell swords for less than he wanted to buy them for.
That is a different ethical situation, because at the end of the day you end up with both the swords and the money.
This is how I had understood "pump" in this general context.
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.
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.