QANTASLINK can solve their attrition rate overnight by allowing career progression into mainline, lets say minimum time in QLink 5 years.
Allowing 40 - 50 pilots a year to progress through, controlling the attrition rate at 40 -50 rather than the 100 + a year. In that time new crew will have a command within lets say three years, then move onto mainline themselves.
At this stage it is easier for QLink drivers to gain career progression into Virgin than it is into their own Q group airlines.
If they don't do something very soon it will be way to late, and like Rex the cancellation of flights will follow.