It has been suggested that the academic economists in the second half of the 19th century introduced mathematical models derived from discarded theories in physics so as to provide their discipline with scientific prestiege. I would suggest that it had another practical purpose: to provide sufficient material to distract their students from reading very deeply into Smith or Mill and coming up with alarming ideas. As the Dutch said while fighting the Spanish: "It is not necessary to have hope in order to persevere."
(That's what would be needed for a straight Paris-Barcelona line, for example.) Un roi sans divertissement est un homme plein de misères