In my opinion the issue is cultural. Everything's in place to churn out a lot of ships, jets, missiles, night vision goggles, etc. Budgets are very high and schedules are realistic. Failure isn't scary enough. It's a problem that can only fixed from the top with sustained effort.
Lead by example. Demonstrate what putting in effort looks like, be passionate about the projects, and inspire others to be passionate about them.
I've made a very conscious decision to not work on weapons, but if I dedicated my life to making weapons then I would hopefully have a core drive to cultivate. Give meaning to the work. The security of your family and way of life are at stake.
If that isn't gaining traction after about six months then try to shake things up with the stick. Put middle managers on alert that failures without improvement won't be tolerated.
"A" position of power is insufficient here. "The" position of power is necessary. It's a big ocean and one person needs to have control of their section to be able to affect change.
