Come to think of it, "Starship Troopers" (the movie) has a lot of subtext commentary about military structure.
You've got your grunt squad, drilled by a tough guy who tells you you're a piece of shit, doing training so hardcore you may experience your brains exiting your skull, fucking in dusty 8-person tents, and then doing the real work of killing bugs and dying in the thousands.
Then you've got your pilots, whose training we don't see, officers from the start, sitting high and dry in a comfy bridge, a pretty boy tutoring the gut-smart rookie, probably making passionate and clean love in a well-lit private bunk with Egyptian cotton sheets, led by a woman captain who tells you how great you are in between naps in her spacious cabin.
Finally, we have the psychic, a high-ranking officer in a spotless uniform proclaiming his own success, who, for all we know has been doing very little if anything but sitting in a comfy room and thinking hard in between boffing lieutenants looking for cushy assignments.
I think the implications are clear: Grunts do all the work, officers fly around in comfort, and command swoops in at the last moment to claim success for themselves.
I may be reading too much into the gaps, and it depends on Heinlein (or the screenplay writer) being a sexist tool (which Heinlein definitely was), but it seems pretty clear to me.