Daga baya, wani masanin tattalin arzikin Amurka, James M. Buchanan, ya karɓi sabon ilimin McKenzie a matsayin sunan sabon ilimin ilimi. Aikin Buchanan ne a kan wannan fannin da ya ba shi lambar yabo ta Nobel a fannin kimiyyar tattalin arziki don "ci gaban kwangila da tsarin mulki don ka'idar tattalin arziki da yanke shawara na siyasa" a 1986. Tsarin mulki ya kasance batun zargi saboda rashin sanin ilimin tattalin arziki na baya amma wannan zargi ya kasance cikin ci gaban tsarin mulki. Buchanan ya ƙi "duk wani ra'ayi na tsarin mulki na yau da kullum game da 'yanci a matsayin mafi girma a cikin mutane, waɗanda suke mambobi ne na tsarin mulki. "Wannan shi ne wani masanin tattalin arziki na Amurka, James M. Buchanan, wanda ya yi amfani da shi a matsayin sunan sabon ilimin tattalin arziki na karni na 19 wanda ya ba da damar yin amfani da tsarin mulki a matsayin mai amfani da ya dace da tsarin mulki. A cewar littafinsa, Buchanan ya kira shi da "Bushman Smith, wanda ya ba da damar yin amfani da tsarin mulki a matsayin mai amfani da ya dace don daidaita dabi'a da dabi'a na mutum wanda ya dace da dabi'a da
James M. Buchanan