There is tons of accountability for some stuff ("How much diesel did you put in that jeep?") but very little for people's time ("Let's have 300 infantry here an hour earlier than necessary before an event, even though it costs X per hour per person for them to be standing around doing nothing.)
It's also the same around some safety stuff ("Everyone wear a reflective belt going on a run") vs time base safety stuff ("That platoon has just been on exercise and barely slept for 72 hours and everyone is now driving home.")
Don't get me started on the overall wastage the military spends on talent management. Doing an extremely expensive and complex course that takes a year+ to complete? Cool, you might often be actually fullfilling that role for one/two years max afterwards before your moved on to next role doing something different elsewhere.