In countries with worker rights protections, there tend to be worker unions which reach common agreements with encoded pay raises (“or else” in the form of strikes), while worker discrimination is either directly punishable, or grounds to nullify a dismissal. There are plenty of bosses with precisely “half a brain”, who’ve discovered the hard way that it would’ve been cheaper to just pay the severance and be done with it.
Then of course you have places with “at will employment”, or more feudal-like structures. Not sure where Australia falls along those lines.