What refinement in the scheme does "a very worthy person" suggest? Why does the economist reject this idea?

The writer suggests that he is not the only one prejudiced enough to support such an idea as eating Irish children. It is "a very worthy person" who truly loves England who agrees with him and even has offered to improve the narrator's original idea. This "worthy person" is supposedly a modern thinker of the English upper class. The person suggests eating the flesh of fourteen-year-old children in addition to infants, which would reduce a child-bearing Irish generation as well. Thus the satire is extended to an entire class of Englishmen. The writer does not think the flesh of school boys will sell as it is "tough and lean".