Affiliate Marketing Secrets

Is it fate or have the energy companies just got a total monopoly? They have all dropped their prices by 5% in the same week. If its was a competition wouldn’t one go further bny doing say 7.5% etc
After watching that watchdog and seeing a graph that clearly showed that they have consistantly, for the past few years, kept prices almost indentical to each other at a higher rate than many gas and electric production price falls, why do we put up with them?
Is there a mother company pulling strings or more likely secret meetings with all the execs basically fixing prices and sharing customers by changing the tariffs and forcing people to go with the cheapest?