The RCAF knows it has a problem. They also dont have an issue getting pilots in. However the recruiting system isnt theirs, and they can't fix the natural result of flying ancient platforms.
Australia operates two fighters, the growler parts commonality is 90% of a Superhornet. So maintenance wise same same. Tactics and load obviously very different. As to why to RAAF can do that? Well the RAAF has 16000 people, and 5k in reserve. Thr RCAF is 15000 with 2k in reserve which sounds similar. What we forget is that the RCAF numbers include Tac Hel and Naval Aviation, so strip a few thousand off of the RCAF. The RAAF also managed to replace their F18s in a timely fashion, the F18Fs are F111 replacements, and I suspect flying modern equipment is appealing to pilots.