Remember too Pat that a lot of those guys were also live play musicians. Hal Blaine played in Vegas for years as well as doing all that session work. John Denver and Nancy Sinatra alone kept him rolling in dough and that was in tandem with the studio money. I think in the movie he said he made $5000 a week with John Denver and that ran like 10 years. Do THAT math, and that was just one gig.