Maybe, but I'm also not sure that the current US administration is really interested in the arms industry.And there's the unspoken answer: that much of the cost can be borne by taxpayers, while private sector military contractors make enormous profits, and the latter have armies of lobbyists.
After all, it's just massively incentivised a load of very wealthy countries to not buy from US arms manufacturers. Who can blame them? I wouldn't have my military dependent on an unreliable vendor nation, either.