One doesn't want to give too much monopoly power to private suppliers of water, so that they can then use that power to lobby government for special favours.
Tolerating this situation will allow China to create a monopoly in the solar industry, leading to disastrous effect on the European solar industry, including suppliers, equipment manufacturers and thousands of installers.
Modern weapons are often so complex that there are only two or three competent suppliers for any given system, and once a major award is won, the company that prevails becomes a monopoly supplier of the system in question.