There is a reason no other airline has applied the "airline within an airline" concept to the scale attempted by Fort Fumble: RASK
It appears the A321 will lower unit cost, as was promised when Boston Bruce Buchanan chased the B788 to replace the A330 borrowed from its parent.
Unless the JQ model can somehow generate revenue premium, the international business will continue to haemorrhage.
To be clear it is nothing to do with pilot remuneration.