Brian Mersereau, Chief Negotiator for the Canadian Patrol Frigate Project has made some very good points in this article in the Ottawa Citizen.
In many arms purchase projects the contractor maintains control of a large portion of the intellectual property, putting it out of reach of the buyer in supporting the project a few years down the road. As bad, the contractor benefits from research paid for by the buyer, generally the taxpayers of the country purchasing. When individual employees invent a product or idea at work, this intellectual property is normally owned by the employer. It is difficult to see why the relationship between government and an arms contract should be any different.