Even if money were not a consideration, the availability of some items could not be assured. For example, a nation that produces weapon systems or the components that provide them technical superiority may be unwilling to sell them internationally to another nation, despite the fact that the other nation can afford them. Today, for example, materials and material processing enable both stealthy military vehicles and high performance fighter aircraft engines. Also, microelectronics, electronics packaging and software enable a competitive military advantage in information. National security relies on the corporations that lead in such technical areas.
National security requires more than assured purchase of parts or materials.
It depends upon the presence of industry that exploits the leading edge of the ripe, new technologies. Only a leading edge corporation has the capability to design, to experiment, and to tailor. It requires knowledge of the technology, as well as experienced engineers and scientists to push the envelope of what is known or what has been engineered in the past. Such design, engineering and manufacturing capabilities provide the industrial muscle that serves national security. Again, assured purchase of parts is insufficient.