I suppose sharing only pilots would be a simpler proposition than sharing pilots AND airplanes like the Air Tanker/TC deal.
IIUC, the article in the OP deals with dual roles, civ/mil, for the pilots. We're already doing that here in the USA via guard & reserves. And while the primary employment is with the airline, when the military calls them up, they go and their jobs are waiting for them upon return (as they should be).
[Admittedly, there's a variation on a theme in the case of those zero-time folks who go from the street into a guard unit (vs a reserve unit following full active duty enlistment) with no airline employment. They can be short of the total flight time an airline might require...but I suspect a solution to that is being pondered.]
I just don't see what's discussed in the article as an innovative solution to anything. I was just curious if OZ or the UK had some established arrangement with enough history to demonstrate its efficacy.