Trim Stab
Why should they need to pay any more than (say) Cobham pay their King Air pilots?
If you need to ask, you really have very little understanding of military Ops.
KA salaries are not always set by market forces, in deed, where KAs are operated by the military (MFTS), the salary will be influenced by location, job complexity and the nature/quality of the pilots required for the task.
Any monkey can fly a KA from A to B but in this instance, the KA will fly from A to B via F, E, D and C and involve elements of mixed profile (high/medium and Low Level) navigation, possibly time on target, maritime surveilance and procedural work. The pilot will have to react to the student observer's needs, the instructor's needs and maintain good situational awareness while chaos occures around him and that aint easy...believe me.
I have a lot of respect for my civilian counterparts who fly the bucket and spade brigade but one should always be careful when comparing the virtues of two very disimilar flying skillsets.
PCMM