There may be something off in Team A, but as far as training "your cheaper replacements" is concerned, then surely that blame needs to be placed at the feet of the A scalers? After all if they'd refused to train the B scalers, maybe you wouldn't be here, MM? Nor I, for that matter.
If that's the road we are going down then the same applies to BA and QF: they have all trained their cheaper replacements. (AF and LH as well as far as I know). Only government jobs appear to have increasing wages in the last two decades.