The way I see it, the point lies in the fact that this way of forcing the "no profit" concept contradicts realism, whether you support it gameplay-wise or not. And that it has to be sold to the players.
You can't go around auctioning off entire UFOs on one hand, then on the other claim that it would be too dangerous to sell a plasma rifle.
I think that, in the end, the combined costs for production (also counting upkeep and salaries) must simply equal or surpass the profit of selling, as was suggested.