Basings.
Expatriates are beginning to comprehend that you can't raise children in the toxic cesspool that HK has now become, for many/most it already doesn't or soon won't matter how much you pay.
KA pilots are only leaving sooner than CX crew because their lifestyle is far worse, rosters appalling, divorces skyrocketing, flying stressful, management 1950's RAF-style, inadequate hotel accommodation and the salaries lower. The recent edict from CX that KA pilots will forever be condemned to fly regionally has also accelerated the desire of many to escape.
Immediate parity with CX pay scales may provide temporary relief but I suspect CX will also face the same issues of staff attrition too, should it not expand its own basings availability. Environmental issues are becoming paramount.
Pilots need to be able to do 7-9 days on and identical days off with confirmed J/F travel to/from a CX destination, the same will need also to apply to CX crew. There will also need to be some form of currency protection.
Inconceiveable now? It's not a 'big-ticket' item and will in all likelihood be the key to corporate success or failure.