That’s the whole point of privatisation: for shareholders and executives to make obscene profits from utilities that used to be state-owned and run as a necessary service.
The Tory governments of the 1980s wasted the money they got from selling our birthright on tax cuts for their rich mates. Many of those MPs, or their offspring, undoubtedly still raking in profits from the privatised utilities.
Same with our railways, same with our water. (How can anyone justify selling a country’s water supply?????)
The only answer is renationalisation. But that’s not on any main party’s agenda.