The political fervour that is whipped up in the populace, from security theatre / war on terror, the war on drugs, etc, takes a life of its own in a pure democracy.
Who whips up that fervor, the war on drugs wasn't started as a grass roots campaign, for sure, it came from the top. It's the same in the US and UK, I think, certainly with the same dark motivations and same ill-gotten power. Anonymity is a friend to the masses and an enemy to power. Whistle-blowers, leakers and disharmonious speech are threats to the status quo, the same one that provides the wealth they wield to have this alleged long-term view.
I don't disagree with the concept of having a ruling body that is not beholden to the mob, I just haven't seen any mechanism by which that body can be kept honest and magnanimous. That is the same spirit which brought down monarchies to begin with.
I'm certainly too ignorant to decide in what ways the UK system or the US system are better or worse, but in this particular example I do not see any significant difference.