It already does for other criteria, like how much is paid by the content provider to have the relevant cable "still work flawlessly" (such behaviour sometimes raises a scandal).
The problem is the network you talk about is a bunch of interconnected machines and cables, each under the control of some entity, which is often a profitable company. What you propose would be very difficult if you want to preserve (the illusion of) net neutrality.
The problem is the network you talk about is a bunch of interconnected machines and cables, each under the control of some entity, which is often a profitable company. What you propose would be very difficult if you want to preserve (the illusion of) net neutrality.