Earlier quoted context omitted.
It's even simpler than that. All of these privatized entities are incredibly efficient... at extracting profits from the public. Of course their goal is to extract profits. And you don't extract profits from a rail line by offering the best service. Bonus points if you can convince the government to bail you out and provide some extra cash.
"And you don't extract profits from a rail line by offering the best service." So how do you extract profits then?
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.