Estimated bills are perfectly normal, sounds like the author has an axe to grind and is clutching at straws. All his friend had to do is give an actual meter reading.
Also complaining about a company paying their staff well is pretty depressing. How is this crazy inequality between the top 10% going to get fixed unless staff are paid more? And yet here is someone complaining about a workforce that obviously have a strong union and insinuating it is corruption. Very sad.
(Source, temped at electricity company in UK while at uni).