So, deregulating sewer pipes will cause a second set of sewers to be built, which will lead to more competition and cheaper prices? Last-mile networks are natu

So, deregulating sewer pipes will cause a second set of sewers to be built, which will lead to more competition and cheaper prices? Last-mile networks are natural monopolies, building even only two networks necessarily causes half of the capacity to be unused, which is extremely inefficient, which is why it doesn't happen (among other reasons).