> How does the pricing work if they are just monopolies.

City granted monopolies. Here's how your plan would work.

>Comcast increases prices 500% (we'll ignore everyone cancelling their service).

>People complain to the city, and they realize the city contracts that allowed them to do this were voted for by the politicians.

>All public officials get replaced next election. Comcast contracts get nulled and they lose their monopoly.

The key to raising prices is to do it slowly enough that only a small number of people are angry at any one moment. You raise prices, then wait till anger fatigue sets in, then raise them somewhere else.