I find your entire argument hilarious.
So how are different water companies going to get their water to consumers through the same pipe system? Magic? Seems to be your answer for other things. Other such public goods and natural monopolies include roads and security, but I guess they could build several roads on top of each other and so you can only pay one company when you drive on them, and I guess Army Inc. could let Mexico invade your neighbors house if he didnt pay his national security bill on time.
Your water company businessman analogy is also laughable. I dont know how anyone could convince themselves that an owner wanting to make as much profit as possible, with no restrictions on price or quality, would be an equal situation to a politician in charge of the plant who was running for re-election in a few years. Both the city government and the investor who own the water plant are going to hire someone else to run the company for them, again the difference here is that the mayor wants to make his electorate happy so he can get re-elected and the investor/owner wants to make as much money as possible.
See the difference? Consumers can force a politician out of office, but they cant force the business owner of a monopoly out of business.
Its obvious that you have a fundamental misunderstanding of economics. I would advise reading the economics website I linked to or taking an introductory economics course.
