Their conclusion, along with several others', including Scully, has been that, in fact, in different jurisdictions what we see is an optimal size of government, whereby moving beyond that level has diminishing returns—you're spending more on the size of government but not really getting anything in return.
La conclusion à laquelle arrivent les auteurs, de même que plusieurs autres, y compris Scully, c'est que la taille optimale varie selon l'État: quand la taille effective dépasse la taille optimale, le rendement va en décroissant—on dépense plus parce que l'appareil étatique est plus gros, mais on n'en retire pas vraiment grand-chose.