Curt Alliaume's Game Shows '75 website says (and I have no reason to believe he'd make it up): Chuck was earning $300,000 per annum in 1981 and wanted a raise to $500,000. Merv Griffin was willing to go to $375,000 and thus Pat Sajak gets a new gig.
I think it was in one of the many Uncle John's Bathroom Readers that Ray Combs was earning $800,000 per year at the zenith of Family Feud's popularity on CBS. Another "I think I read" that Regis was earning $250,000 an episode at one point on Millionaire, but it could be a misplaced decimal point or I just remembered something out of whole cloth, and Harry Eisenberg's book sez that Alex was pulling down $500,000 annually as host/producer of America's Favorite Answer and Question Show. For the time period where he was doing double duty for Mark Goodson, he might have earned half again as much.
Jim Perry would be making decent money as host of Card Sharks and Sale of the Century and considering the parity of the Canadian dollar his work on Definition was probably enough for him to buy a twelve-pack at Tim Horton's.