Why Do we Follow Politicians Advice

I have tried to find a reason why we ordinary people follow politicians advice and as yet I cannot find one.
Maybe You the readers can give me one.

Politicians all over the world love to control the people that have put them in power. In the U.K ten years ago the politicians told the guy on the street that crime was getting out of hand and they needed to employ a high tech solution to the problem. This solution was to fit Closed circuit television cameras all over the country. Money was no object to getting them put up and with the help of the media whipping up a frenzy over crime. At this point the people where demanding to have the camera's fitted and lobbied there government ministers to be the first. This was music to the politicians ears and up they went.
Now 10 years on and we are the most monitored country in the world, we have 20% of all the worlds Camera's. They are everywhere.
They are now even building them into the cats eye's in the centre of the road to record cars that are speeding.

But you might be saying think of the benefits of such a monitored country. Well crime has risen and the jails are overflowing, with the highest recorded number of criminals ever. Now even the people who wanted them started to ask questions. So what do the politicians do but to find a new threat, Terrorism.
With this new more deadly threat announced to the people the media came on board with lots of different possible attacks pending, fear was created and the media made lots of money.

We are then told that to reduce the threat we need a better solution to getting information and that's digital camera's so they began to add extra camera's with the New smart technology that allowed there computer systems to track people using facial recognition across a town or city.

Now with all this technology being sent out onto our streets how come drug dealers still operate on our street corners and mugging still takes place in our big cities and drive by shootings take place when everything is recorded.
It certainly makes me think what the real use of this equipment is.