Well, it is of course not so, but reading The Capital again, I got stuck when I came to the footnote 2 on page 605:
Bentham is a purely English phenomenon. Not even excepting our philosopher, Christian Wolff, in no time and in no country has the most homespun commonplace ever strutted about in so self-satisfied a way. The principle of utility was no discovery of Bentham. He simply reproduced in his dull way what Helvétius and other Frenchmen had said with esprit in the 18th century. To know what is useful for a dog, one must study dog-nature. This nature itself is not to be deduced from the principle of utility. Applying this to man, he that would criticise all human acts, movements, relations, etc., by the principle of utility, must first deal with human nature in general, and then with human nature as modified in each historical epoch. Bentham makes short work of it. With the driest naïveté he takes the modern shopkeeper, especially the English shop- keeper, as the normal man. Whatever is useful to this queer normal man, and to his world, is absolutely useful. This yard-measure, then, he applies to past, present, and future. The Christian religion, e. g., is “useful”, “because it forbids in the name of religion the same faults that the penal code condemns in the name of the law”. Artistic criticism is “harmful”, because it disturbs worthy people in their enjoyment of Martin Tupper, etc. With such rubbish has the brave fellow, with his motto, “nulla dies sine linea”, piled up mountains of books. Had I the courage of my friend, Heinrich Heine, I should call Mr. Jeremy a genius in the way of bourgeois stupidity.
The difference between Bentham and Thatcher was that she did not pile up mountains of books but made, by applying the same way of thinking, a country relatively rich, its people relatively poor and the thinking absolutely un-societalist = lacking any consideration of solidarity. Indeed,
– after the country had been reduced on individuals and at most family and neighbourhood, the plan is now Europeanised: BREXIT was and is an expression of exactly the same thought.
 Marx & Engels. Collected Works. Volume 35; Lawrence & Wishart, electronic books; 2010