That's a cost-benefit equation that every country needs to make for itself, but it's one that you see frequently in defense contracting - a country will be perf

That's a cost-benefit equation that every country needs to make for itself, but it's one that you see frequently in defense contracting - a country will be perfectly happy to buy e.g. a tank design (and several hundred examples) from a foreign country, as long as it includes the know-how to manufacture them locally. For example, in the rather interesting Israeli case, purchase of the F-35 was conditioned on Israel being able to replace the avionics, which are probably the part most vulnerable to unnoticeable tampering.