Contracting out strategic AT tasks can only make sense where the task is known well in advance, doesn't require any flexibility and is to/from a benign location. Contracting out these type of tasks (e.g. RED FLAG manpower roulement) can reduce the strain on military assets without being prohibitively expensive.
And to provoke debate...
"6) Where would the airlines get their very best people from without 10, 99, 101, and 216?"
I'm surprised you haven't had an answer from anyone on 24 or 30. Unless the airline in question only operates near-lifex aircraft, J pilots are far more likely to be familiar with the modern flightdeck than anyone from 10, 101 or 216!
N Joe