Be sensible mate, if EK were granted a few extra slots into Canada each week, would that really be the end of AC?? And if the answer to that is yes, then frankly they should move aside to allow a younger, fitter, better run Airline to step in........ Say, Canadian or C3 or Royal for instance...... Oh wait AC destroyed those already. No-one would ultimately lose jobs, as the public would still need to fly, and fly they will.......Just maybe not with AC, get over it!
In the first place you need to get some facts straight. Air Canada did not destroy Royal, C3 bought it. Air Canada did not destroy Canadian, Air Canada bought it. And Air Canada did not destroy C3...C3 destroyed themselves. You have no idea what you're talking about in that regard.
Second, the Canadian government is not in any way obliged to let a foreign carrier bury Air Canada. Quite the opposite.
There are national interests involved here, and frankly your opinion about what the government should and should not do wrt to Emirates usurping Air Canada wouldn't enjoy a lot of airtime in the House of Commons for a very good reason.