OK, a couple thoughts:

It would be great to have a basic rank structure. Within the "team" it can be ignored, but it adds a level of realism. I can come up with one if you'd like.

I don't think it makes sense to discourage soldiers, especially elite soldiers, from calling in vital support if they need it - really, bearing the cost of such things is the government's job anyway. I think it makes more sense to say "you have resources, but don't call them if you don't need them, you're expected to do this on your own as much as possible, that's what WARG does" as a precautionary measure, and leave it at that. But that's just my opinion.