Contracts for arms manufacture. I'd remember reading one way or the other, but seeing PHALANX is supplied by the world's military I don't see the problem with them releasing the specs of new research to it's suppliers. The suppliers then turn around and make them for PHALANX or the world military.
Which would allow for some leeway in the story. Why hasn't the player run into a 1,000,000 vs 8 mission? PHALANX is the speer tip responsible for guarding the planet, but that doesn't be the rest of the planet is inept , and sitting on it's hands.
Edit: If I may reference it, in the Stargate TV series the flag ship teams are the one doing most of the cool stuff, and making galaxy altering decision; However, but that doesn't mean the rest of the teams are not doing anything. It just means when that needs to be done they call on the flag ship team.
Edit:I/O ERR 0x00000001 English != My friend. Need English++ ... (Fixed more grammatical errors then I want to admit.)