I disagree with this generalization in the Marine Corps. When I was in the Corps, (1982-1986), it seemed to work only one way in my battery. E-5's a Staff NCO's referred to those junior in rank by their last name only, (which I view as disrespectful to this day). I got all of my promotions meritoriously, (with the exception of PFC out of bootcamp), yet my Staff NCO's continued to call me Jewell rather than Corporal Jewell. I finally asked my First Sergeant how I was expected to command respect for my rank by my juniors when my seniors couldn't show respect for my rank. He agreed, and from then on addressed me with my rank. It was after this that the rest of the Staff NCO's changed too. Is it possible that my battery was the exception in the entire Marine Corps? Yes, but it certainly wasn't probable.