In regards to a monopoly, which I know will be your responses to what i've posted below - how do you think most monopolies arise in the first place?
government regulation such as price controls.
I will give one example of the water companies which i'm familiar with. A great deal of people blame the water companies for being too greedy and charging too much for the droughts and shortages we have. This, on the face of it seems rational and it would then seem rational to have the water companies prices regulated and have the government even nationalise them. But this is a false argument, because if you look at the water companies in this country - it has been the government who have regulate the companies to the extent that only a few companies exist and are unable to build backup lakes due to government regulation.
If I manage to open a new mobile operating company (which, with the amount of regulations if very difficult) and I offer a better service but for a higher price (which I also need to do to recover my costs of investing in the first place) - you are preventing me from doing this. You thus prevent the market finding its correct value and you distort it, serving only to enforce the monopoly that the main companies at the top have because they then cannot be displaced by new rivals. I mean, why do you think so many large companies support (via lobbying) candidates and governments which want regulation? because it helps cement those at the top in their place.
It is the classic law of unintended consquences, you only serve to reinforce the monopoly.
Yeah you're both right actually, lets regulate prices - worked well in the 1970s didn't it? why not extend it to televisions, energy, fast sports cars, football kits, clothes, iPods? hell, lets just nationalise everything!
If you seriously believe price regulation by the state (de facto nationalisation) works then frankly, well I don't even know what to say.