Forget about Aus/New Zealand, not even the locals can get back there after working overseas. Don't know about Canada, but i gather it is much the same. Any of these countries and you would be better off if you did some other kind of work. You or your wife a qualified nurse, dentist, doctor, plumber, electrician etc and you might stand a chance. Pilot...forget about it. Try looking at their consular web site's emigration pages.