This is a critical-hermeneutical review on labor relations under the heterodox approaches, specially the Austrian Economics, to debate with mainstream bias. First, there is a diagnosis about the economic interventionism in the World and which is the current relation between the economic theory and applied economics. Second, the attention is focused in Card & Krueger study, as recent Nobel Prize in Economic Sciences, with contributions of natural experiments in Labor Economics and against to the traditional economic theory. Third, there is a discussion on the results, with some refutations according to the Austrian Economics and the mainline approaches.