Regards KA, there’s alot of chat every year about letting go of the KA COS based “ chinese new year bonus” ( fwiw 13th month) for an 8% pay adjustment .KA crew would then revert to the discretion 13th month CX may ( or may not) receive.
"May not" will be the norm, just as it is for CX now. KA will never give up the 13th month. Lessons have been learned from the AOA's mistakes.