Who's Missing?

Who is missing here? 

Given that this was recorded in 1985, what Canadian voices are surprisingly absent?

Ian Tyson—although Sylvia is there. Paul Anka. Celine Dion—she was already big by this time in French. Richard Manuel from The Band is listed in the chorus, but I don’t see Rick Danko or Robbie Robertson. A bit odd, since Ronnie Hawkins is prominent. Denny Doherty, from the Mamas and the Papas. I think he was living in Toronto area at the time. Zal Yanovsky, from the Lovin’ Spoonful—in Kingston then. It makes sense that Gilles Vigneault is not present—he would consider himself a Quebecois, no doubt, and not a Canadian. Buffy Ste. Marie, despite her popularity in Canada, apparently never held Canadian citizenship. Catherine O'Hara is present, but not her sister Mary Margaret, But then, Mary Margaret was not famous yet. But where are Kate and Anna McGarrigle?

 And where’s Leonard Cohen?

I checked. He was in the middle of a World Tour. So that explains that.