I don't think "Britannia Unchained" manages to achieve the level of nonsense.

Oh, it's even 'better' than that. To quote from an article in the Guardian:

It’s a short book but if you read it you’ll see that a decent editor could have got it down to one sentence. “When we seek to protect the vulnerable we limit the freedom of the rich and the privileged – and that is a disgrace.”

It’s a wretched read – a series of assertions and hunches freed from the chains of argument or evidence, with the intellectual rigour of a YouTube conspiracy rant. The prose occasionally soars to the level of clickbait, as in its most famous sentence: “The British are among the worst idlers in the world.” Most of its authors are now cabinet ministers in a government that no one would call exactly Stakhanovite.