The binding is coming from inside the building, so to speak. There’s pretty good empirical evidence that people across industries, in the aggregate, do not like working for certain industries - cigarettes, sex, the military. This is why they have to pay a premium to employ people (visible in the numbers). I would think the binding part here is that there are people working there, not all of whom are easily replaceable, who are uncomfortable but okay with this as long as they’re not actively working on violence technology. If that changes, they will enforce the “penalty” by leaving.