There is another side to the secondary duties debate. Although I'm a shift worker I can't pretend I'm out of the country a lot or even that I work very long hours, but I didn't join up to manage the station ladies underwater basket weaving society or to bray and harrumph about mess flowerbeds in various commitee meetings.
I volunteer for dets whenever I can because I joined up for a bit of adventure. I would cheerfully work another hour or two on every shift if it meant I never had to wade through all the secondary drivel.
This attitude won't get me promoted but I'd rather be an eternal Flight Lewy who was good at his job than a Squabbling Bleeder who'd greased his way up.
Rant over.
