You say that, but I know of a recent system acquired by the MOD which came with contractor logistics support. A particular component had to be removed because of an electrical issue. It was then found that the bolts holding said component onto the aircraft were one-use items and, you've guessed it, the bolts weren't included as part of the spares catalogue. You couldn't make this stuff up...!
One of my acquaintances is an ex-Navy flight maintenance rating and he says that the number of one-shot, don't re-use parts in planes drove him round the twist - especially with choppers and jump-jets where you dare not take chances.
Why ? Because every new part required a requisition order signed by his senior officer and then the stores master and in any case they often had to wait until they got back to port to get the bits anyhow.
You would be amazed how many Sea-Harriers spent an entire 3 month tour tied up in a hanger because one bolt holding on something minor could not be re-used.
Note. if the Falklands blows up again we are stuffed - no Sea-Harriers and no F35s yet. Just some tired old Sea Kings (probably the same ones as last time).