Working hours issues are a classic management problem. The Boss(es) should monitor the issue, and deal with it, or send it up the line if they don't have the resources/scope to do so.
Any organisation, civil or military, that routinely expects staff to work 50% over their hours has problems that need addressing.
Testosterone-riddled organisations such as HM Forces can't see the problem half the time, and the other half say one of: it'll go away (it won't), it goes with the territory (historically, yes, perhaps, but no excuse) or otherwise brush it under the carpet.
What they won't do is look into the long-term problems caused by over-long hours. Staff retention is the first one, followed by staff morale - depression is common amongst people working long hours. Do you want a depressed colleague in a key, safety-critical role?
A good organisation will measure hours worked as a KPI, and follow up on departments/teams that are having to exceed limits.
LEAN, defence budget cuts, exped warfare, long hours, go figure.