They will always get away with it because most people are stupid.
Seduced by the media, social media, reality TV, smartphones and the like.
The people have the power to change everything but most are too dumbed down and comfortable in their lives to realise it.
It's only a small group of people who are controlling everything and they know how easy it is to do it, anyone exposing it is labelled a conspiracy nutjob and shouted down by the brainwashed masses. Its not just a UK thing, its worldwide. Sadly it isn't gonna change anytime soon, certainly not in my lifetime.