That's the reason the US pilot unions enacted the 'scope clauses'.
They foresaw the adverse potential and
negotiated ‘scope’ clauses with the companies. In a very short time the companies realised they didn’t like the ramifications but it was too late; it was in the contract.
However, companies like Qantas observed & learned quickly. Even before James Strong was Qantas’ CEO it was stated that Qantas would
NEVER allow scope. As recently as the ‘90s, a segment of QF’s mainline pilots offered management significant savings/economies
provided scope was included for all future Mainline types. IT WAS REJECTED OUT OF HAND.
Jetstar, Jetconnect, Q-link, Q-jet, etc make the reason why obvious.
