BAES are not a monopoly in the defense sector. The last aircraft they produced on their own was the hawk. Aircraft and defence are a global industry. The Apache, C-130, C-17 and Dave are not BAE vehicles, yet are in or will be in the UK defense forces.
(As stated above) The problem is that all large companies move at the speed of frozen treacle and have to have stacks of red tape, sorry 'procedures' in place to ensure quality and conformity, as demanded by any reasonable customer. Do you really think that the customer doesn't change requirements during the process? Who foots the bill for that? do they allow a reasonable change to delivery date or make you absorb it in the current schedule?
If the contract limited costs, had proper risk sharing, reasonable methods to exert against change, and incentives/punishments then there is the chance it'll be successful. But all of that requries a special team of people to keep an eye on it and another layer of red tape.
I thought business culture was trying to move away from the blame game and move into a lessons learned culture.
I'm just a lowly engineer, that has witnessed the above rather than have been directly involved.