It costs money to build a network. It costs money to employ the people to service it and you.
This is a very valid point. Without revenue there would be no phone service. We should expect to pay for phone service, and while I think mobile costs are still too high, I don't think that land line costs are too egregious.
My question is why the voice quality hasn’t improved. The phone calls we make today, whether over land line or cell phone, still sound like the ones we made in 1989. It’s still AM quality when we should be getting FM quality. Why can't the phone companies make the quality as clean and near true fidelity as a Skype call?