It is simple, if the OP gets his way sooner rather than later one of these groups will take full control over some vital system or station and suddenly some rare item we all need for engineers or whatever is denied to all except these squadron members. Or they will decide that anyone entering their system is the enemy and killed.
We've already had that with the AEDC attempting lockdown after lockdown in Lave , blocking the supply of brandy, which is needed to unlock an engineer......
Bill