Executive Summary This analytical paper provides a comprehensive critique of the dualist approach to the labour market in the developing countries. It disapproves the dualistic labour market assumptions by reviewing the informal (secondary) and formal (primary) labour markets of the developing countries and the inefficiencies that operate in these markets. Besides, the treatise examines the low labour productivity levels common in the developing countries that makes the informal employment sector an alternative desired by labour providers in developing countries. In addition, the paper reviews the unique transitional features of the formal and informal labour markets of the developing countries that disapprove the assumptions made by dualistic view. Reflectively, the differentials in traditional earnings are indicated as unable to disapprove or approve the developing countries labour market segmentations within the unlimited mobility of the workforce that is non rigid and non proportional in the informal and formal segmentation. Introduction In the dualist market, there is a long traditional view that opines that a substantial proportion of the labour force in developing countries working in informal (secondary) sectors and are unprotected by legislations of labour are disadvantaged. However, the dynamics of the informal sector in the labour market have attracted different views. In the ideal dualistic labour market, increasing flexibility and efficiency of the labour market is an indispensable complement of the reforms that are market based. In the ideal, the segmentation degree is controlled by union and government regulations that are designed to encourage rigidities and drive the costs of labour above the market clearing level. Therefore, the informal sector remains non proportional to reflect on the magnitude of the reforms required. Thus, this reflective treatise argues that the dualistic approach to the labour market is inappropriate in the developing countries. As a matter of fact, the incentive drive to work in small firms is greater in developing countries than in developed countries. In developing countries, the rigidities and inefficiencies accompanying labour protection and taxation that are applied without factoring in a legal minimal wage often reduce formal (primary) employment attractiveness. Besides, the formal sector low productivity for the large number of poorly educated workers reduces independent employment opportunity cost developing countries. Dualistic Labour Market Views Dualistic labour market view envisages general patterns. The protagonists of this school of thought argue that dualism often exists between secondary and primary labour markets. In the primary labour market, jobs are well paid, there are good work environment conditions, job security and stability of employment is certain, formal and equitable work process is guaranteed, and certain advancement structures exist. On the other hand, the secondary labour market is characterised by jobs that attract low wages, dismal working conditions, employment structure is variable, and they posses few opportunities for advancement (Harris and Todaro 1970). Reflectively, “if formal sector work prefers to informal work, we would expect that workers would queue up for formal sector