My guess...CX destroying the lives of most based crew, have shed a bunch of HKG crew off the 777 who took the recent payout (who were also still receiving proper housing) and CX expect to loose a bunch more as their housing allowances move to POS18. Visa renewals are a big problem. By taking on ex KA pilots they get highly experienced operators for bottom dollar, with a start date (and therefore having to pay anything) at the company's sole discretion, ready for the boom which will happen within about 6 months as populations reach herd immunity.