A well-functioning market has rules. Different rules might be appropriate depending on the market. As an example, rules that prevent phone subscriber lock-in a

A well-functioning market has rules. Different rules might be appropriate depending on the market. As an example, rules that prevent phone subscriber lock-in and makes it easy to switch provider, those constrain the possibilities of the providers, but at the same time they facilitate fierce competition over end-user prices - possibly creating a better market by creating a good playing field for the competition to play out.