I guess everyone believes what they believe. I was told by the Concierge in the Diamond Lounge last year on Quantum that the drinks through the voucher system have nothing in the way of tips going to the server or bartender. I also asked about room service and he said most room service runners do it voluntarily as a way to get extra cash tips. If the delivery is free there is no tip to anyone, if the service fee applies then there is a small amount that goes into the ship pool.