I do not think that solves the question. What is the reasoning behind the assumption that GDP/capita in the UK should be equal to that of the US? And why should

I do not think that solves the question. What is the reasoning behind the assumption that GDP/capita in the UK should be equal to that of the US? And why should it not be equal to say, that of Italy instead? The author is assuming a certain "natural order of things" and placing the UK a few ranks higher than it actually stands.