Somewhere in the middle. If you consider the work that goes into making a plane, you'll see quite a bit of it happens outside Boeing. To give one example, think of the aluminium that goes into the plane. Boeing doesn't have to mine bauxite, extract the aluminium from the bauxite, transport it to the place where its sold, etc...
A classic example of this ground-up view was this example given by Milton Friedman about the pencil. I don't agree with many of his views, but I think he makes a good point in this video:
https://www.youtube.com/watch?v=R5Gppi-O3a8
EDIT: Turns out the source of this example may have been Leonard Read:
Regarding...
"On the other side Boeing pay them money so they can proceed to mine."
Perhaps you know more about Boeing's business arrangements than me, but I certainly couldn't verify that that's true. From what little I know, it's possible Boeing's aluminium suppliers work exclusively for Boeing, but it's also possible these same aluminium suppliers have multiple customers. The point being, there could be people who work as part of the chain to produce and transport the aluminium who have no idea who will eventually use it.