Question about Sea Scouts/Quartermaster

I remember from a long time back that the highest rank in sea scouting was the quartermaster award. I always thought that was odd, but never asked about it, and then I randomly thought about it today.

Why is quartermaster the highest rank? In Boy Scouts the quartermaster was important, but probably a middle-level position of responsibility. No shade, I'm just curious why they didn't call it something different.