Until such time as your superior negotiation skills price you so far above the market that your employer will set up another airline or crewing contractor to replace you. Or your airline goes bust.
Negotiation ain't just about maximising pay if the jobs go elsewhere. There has to be an element of reality in there somewhere.
If someone else is prepared to do the job for less, your only option is to pursuade your employer that your higher premium is worthwhile.
That's become a lot more difficult for pilots in recent decades since the accident rate has declined significantly, and a pilot of mere adequate competency and experience is considered by the bean counters "good enough".
I've noticed Emirates has embarked on a significant marketing campaign to recruit pilots because they can't get enough to replace those who have had enough and are leaving. If that doesn't work they may have to up the incentives. Sadly we rarely have that supply/demand equation in Australia, and when we do the answer tends to be ab-initio cadet programmes.