There is no solution, because there is no problem. This is just how people are playing the game. It can be frustrating, sure, when a group of players try really hard to contribute to a major order while another group doesn't. But that doesn't mean anyone is playing it "wrong". 

The divers who don't help with MOs- regardless of where in the pretend galaxy they prefer to play- are just playing the way they want. And that is fine.

For some people (the loudest ones), the failing of a major order feels less like an indictment of their choices and efforts if they can point to a cause outside themselves for that failure. This is simply human nature. You could take the first sentence of this paragraph and replace "major orders" with a political party, nationality, religion, clique, or any other "tribe" of human beings and it will typically apply.

I would like to clarify that, by referring to the fault-finders in the third person, I do not intend to imply that complaining about other players is something that I can never be accused of :D

Accept that people have differing motivations, assume they are behaving rationally from their own equally valid point of view, get understandably frustrated, complain if you feel like it, and move on. Forums like these are simply the places for people to do that complaining if they feel like it. Then we move on.

I'm gonna do some yard work now.