Being a “business” or a “government” is not an automatic, meaningful distinction. A government is that which governs. If you give ISPs the power to govern themselves and their customers, then they are, in fact, a governing body, regardless of what you call them. However, businesses typically exist for profit, for its shareholders, and not for their customers. A government is supposed to serve its people. If you allow a business to exist unregulated, do you really believe it will serve its customers, and not abuse them for its own gain? The people must have some representation, and that representation must be empowered to protect them.