They didn't spend extra to develop or patent custom avionics superior to civilian technologies, or even try to lock secret intellectual property into the designs, to create a barrier around the fly-by-wire systems. This is a rare event when it comes to corporations interacting with government programs. Especially when fielding niche high technology line items with decades-long lifecycles.

Whether it was stipulated as part of the government program or one of lockheed's design decisions, there's a sense that the economical option provides breathing room for false compartments, without reducing superficial complexity.