That sounds like https://en.wikipedia.org/wiki/Jevons_paradox https://en.wikipedia.org/wiki/Jevons_paradox, and in fact the article has this snippet: "The expan

That sounds like https://en.wikipedia.org/wiki/Jevons_paradox https://en.wikipedia.org/wiki/Jevons_paradox, and in fact the article has this snippet: "The expansion of slavery in the United States following the invention of the cotton gin has also been cited as an example of the effect.[12]"