When I was a new Capt. on the 737-300 an elder 767 Capt. wanted to jumpseat ( waive $5.50 pass ) knowing there were 4 firstclass seats available from ORD to SMF. A young commuter guy came down and the old 767 Capt told him he had the jumpseat. My F/O and I being former commuter guys wanted to take the young man with us. I asked Bill " can you write a pass so we can take him with us?" He said; " I'm already writing a pass for my wife". I told him that if he wanted the jumpseat that he was entitled to it " but if I have to leave him behind your going to sit IN the jumpseat". The big spender ran up to the gate to write a pass.