Here's how it works (roughly): AU based airline flies route between SYD and BKK. Airline reduces capacity of SYD crew base. Airline declares BKK a crew b

Here's how it works (roughly): AU based airline flies route between SYD and BKK. Airline reduces capacity of SYD crew base. Airline declares BKK a crew base. Airline pays BKK cabin crew local rates. BKK cabin crew staff SYD->BKK->SYD flights. Profit.