Requiring C3 armies to come off world market

Currently in C3 wars all Weapons/Ammo just appear out of no where. My suggestion is that all Weapons/Ammo to come off the world market.

How it would work is that when the war starts the game creates all the units outlined in the war guides. After the war is won the game takes the total number of weapons/ammo lost and removes that amount from the market. This would create a massive demand for weapons and ammo.
It would also allow the GM to massively increase the production of weapons corporations, decrease the cost of weapons, and allow players to become more self-sufficient in producing weapons/ammo.

Why is self-sufficiency the goal here? Seems like the whole economy of this game is designed to make it nearly impossible, and it's a major accomplishment if you can do it.

I do agree, though, that C3s getting stuff from nowhere does seem a bit silly. The broad sentiment is one I like.