Actually, there was a vote by SAG a few months back, and they decided, for about the sixth time, to remain a separate, "sister" union to AFTRA. Some of the members feel that SAG is the only place for "real" actors outside of Equity, and that AFTRA is a bunch of "disc jockeys". That's partially true, but not entirely.
Truth be told, SAG does a lot more than dictate the day rate, which is usually the rate for non-principal extras.
There are session fees, residuals, demo rates, and variations in rates for the difference between a wild spot, a regional media buy, or a class A national spot, which might feature James Earl Jones. Then there is the health and welfare payment made by the signatory, and the retirement plan if you do enough work in a year to qualify. In addition, SAG tracks your spot's airings to be certain that you get paid for residuals that run on TV. AFTRA does not do that for radio.
To be sure, a certain amount of work does go to Canada. The cartoon version of "X-Men" features a number of Canadian voice actors, like Venus Terzo (Jean Grey) and Meghan Black (Rogue,
cute pic ). These talents work in Vancouver, near where my dad was born. Meghan did a lot of popular Canadian TV (Edgemont, for example). She's a real hard worker, and still in her teens. When she comes down here, and I think she will, she'll join SAG.
A good amount of animation graphics are done in Japan now, but the really high quality shows get voiced in LA just as they always have. Warner Brothers and Hanna-Barbera aren't going to roll over and play dead. The best people are still SAG.
There is plenty of work, in fact the majority of work in the US, that is not under SAG's umbrella. Most SAG actors work in NY, LA, and Chicago. You may see the formation of a Canadian performance union in the coming years.
At any rate, getting back to what we were saying about pilot unions: they can help you, but they are by no means a panacea. If your union is only looking out for the top one third of pilots, then you might be in trouble. It's a matter of by-laws.