According to an interview in a newspaper I read, which I would have to find to pinpoint the date and source, Jack was paid $30,000 per episode in 1974. I posted that information on the IMDb a while back. This salary might be due to Jack being a co-producer. Today, $30,000 is what a guest star on a hit sitcom would make. A guest star on The Big Bang Theory would get paid $38,000.