ControlledRest
The FCN you refer to is Voluntary Return to HKG. The key word is Voluntary
If you are faced with base closure, and the company offers you to return to HKG to keep your job, then CX must ensure your job is secure i.e. that they guarantee work permit etc certainly for more than 3 months. Otherwise it is a redundancy situation.
Your T&Cs in HKG have to be equal to your current T&Cs otherwise it is a degredation of your entitlements.
The Labor laws you refer to also have different interpretation of the Base Closure Clause in your T&Cs. A good example is AUS labor law allowed CX to pay ZERO salary, which is not legal in other "First Countries' " law.
CX can only do what its allowed to do under HKG law. Yes other countries are opening up, however "Zero COVID Policy" countries are being left behind. Nothing to do with how much top brass load their pockets with. As you say, they have always done this without scrutiny.
As for your comment about only 300 lucky ones were happy with CoS18. You're wrong simply because a lot more than 300 signed up to it because that's all they can do in order to put food on the table for their families, what's wrong with that?