1.) Force other competitors to go belly-up or buy them to create a Monopoy or if the authorities don‘t let you do that, try to end up in a duopoly situation where you and your competitor come to some silent agreement to not overly compete.

2.) Raise the regulatory bar to prevent startups from entering your field.

Milk whatever half dead infrastructure you have and people depend on.

Oh and raise prices every odd year while still not investing in the rotten infrastructure. Somehow investors need to see growth and dividend payments.

Due to 1.) there is no competitor left that could offer a better service. People cannot simply switch.

Die to 2.) you are not in danger of ever having to face situation 1.) again.

Job of the government is to not let 1. and 2. happen.