> Why doesn't the monopoly employ the same cost-saving measures for even bigger margins?
They would.
The issue is that competition alone wouldn't fix it, because there is an information deficit. Some people will pick the lowest price and not realize that the ISP offering it is taking kickbacks from incumbent services to degrade their own competitors. And since this is always bad -- it's anti-competitive in the market for over-the-top services, so this is an anti-trust rule -- it should be prohibited regardless of whether there is competition in the ISP market. Because you need it in order to preserve competition in the markets for other services.
They would.
The issue is that competition alone wouldn't fix it, because there is an information deficit. Some people will pick the lowest price and not realize that the ISP offering it is taking kickbacks from incumbent services to degrade their own competitors. And since this is always bad -- it's anti-competitive in the market for over-the-top services, so this is an anti-trust rule -- it should be prohibited regardless of whether there is competition in the ISP market. Because you need it in order to preserve competition in the markets for other services.