@ Lon More ... a very fair call on the training bill, albeit from the Civ side. The same applies to UK Mil ATC ... expensive simulators at the School, large number of staff, and then On-Job Training [OJT] at the Units. In the Mil case it's
worse, as a posting every 2 1/2 years means re-validation at a new Unit [with the same manpower bill for training until the individual is fully validated]. Even the best people can take 3 months to work through a well-run local system.
My very last task before I retired was to produce a paper identifying ways of 'efficiencising' OJT ... it's a huge bill. I have no idea whether any of it was implemented, of course, but it looked good to me.