TAA and Qantas tried cadets in the sixties and they gave it away after one or two intakes, but bean counters have been to uni where they have been taught by cloistered dills, with no common sense, all about saving money.
They all think they know best and from their lofty heights make complicated calculations that come out with something precise, like 20.3456 people and try to apply it to reality.
What twenty adults and a kid?... of course the practical people on the floor know that job needs twenty two people minimum with no cockups and twenty three to be sure.
For decades the old and bolds taught the student as he went each rung up the ladder, now some lecturer with no practical experience lectures and a peice of paper announces the student is full bottle... Haaaa!