BPS to be paid 10% above pilot - sorry contractor - fees.
This will save HA in the order $7 per flight our for a single, and $16 per flight hour for a twin driver PLUS the money he saves by not paying the minimum 4 hours pay for duty periods in excess of 4 hours duration, which is probably the more significant bit.
If HA doesn't want the bill of high priced "casual" labour, he should put more staff on salary. However if HA did that, he'd also have to start acting like a responsible employer; or expect to see many more unfair dismissal, harassment, and compo cases, etc.
It's all about trying to wield his power and control really. But like the dictators of the past (and present), the selfishness, pride, and arrogance to ignore the human rights of those falling under his authority and responsibility will eventually catch up with HA.