One more question about Vader... do you think he earned a salary? I've often wondered what kind of salary and health benefits you get as a Dark Lord of the Sith.
Now that is one I actually can answer. In Shadows of the Empire (one of the few EU books I have read) they mention the castle and that is wealth is, something like, beyond calculation or more than can be comprehended. However it was phrased, it was made it clear that he is loaded. I don't think he needs benefits. Anything he wants, he can afford...but who would dare send him a bill, anyway? Would you?