To a pilot that statement is immediately obvious, to the accountants and business MBA,s that run the airlines, that statement is like showing a cross to a vampire. Their recent iteration of reducing crew costs was the introduction of the MPL. Thats where you took a zero hour candidate,gave them ten hours in an aircraft then 100 hours in a sim and plonked them in the RHS to act as a low paid, debt ridden, seat warmer. There is no technical advantage in single pilot cruise ops ( or the Airbus acronym Single Human In Technology), only a supposed cost one.