My understanding is that the YEG Center controllers as well as the YYC tower, approach, etc. guys and gals like protecting their overtime too much for the general good of all. So instead of getting the correct amount of employees to do the given job, they get to work overtime whenever they want, but the rub is that you then get days when there simply aren't enough people to do the job. Anyone ever hear of "flow control" for northbound aircraft out of Calgary and Edmonton? That's where that comes from.
Someone ought to point some environmental group towards these guys; maybe that's the way to solve the problem. How much fuel is burned as a/c sit on taxiways, aprons, etc. waiting for their "flow time". Just another case of the tail wagging the dog - now wait, where have I seen that before??