If safety is the issue that really bothers the TWU how about instead of short notice strikes that alienate the public (and possibly spawn more right wing voters) they work to force capacity caps on airlines and airports until they lift their game? The Poms appear to have done this.
50 or 60% on time performance is simply not acceptable. Cut back service until 90% is assured - of course the unions have to play a part in delivering this, too.
We know money is also an issue, and probably the root issue, but ain’t that the case for most of us now?