Jay,
Why?
USAF again: 328,532 total, 65,181 of whom are officers. That's one in five and if you've seen the levels of over-specialisation of their groundcrew you'd understand why they're a little higher than us. "Yes sir, my job is to service the left-hand outboard flap track of B52H aircraft, Bob does the right hand side"
We're not the Army, our requirement isn't for a few officers to lead herds of men over the top.