I've said it before, there is only one effective response to this.
47% of HK-based pilots need to resign en-masse. Three months notice, starting now.
If the company brings resolve to the table the mass-resignation is withdrawn. Water under the bridge. CX cannot pick and choose; it's all out and all back in. Solidarity in its truest form.
But the move entails considerable risk for the 47%. What of CX accepts the resignations? What if they're willing to drastically cut production to rid themselves of overpaid staff?
If they are, then you needs to ask yourself if this is really where you want to be in the first place. It will never get better.
History shows that appeasement only delays the enivatable when dealing with such people. No more letters, no more negotiations, no more daydreaming of sick-outs, training bans, contract compliance and withdrawal of goodwill. They won't get you to the finish line. These tactics only divide, confuse, delay and give the company enough time to manage the situation.
This is it. Either fight the ultimate battle or capitulate. Stand up for yourself or get what you deserve.
And for those unfamiliar with labour struggles; en-masse resignations is just a fancy word for a strike.