This paper is to deepen our understanding of an apparent paradox of the labor market, the coexistence of labor shortage and umemployment. Why local labors are left jobless at the same time that labor shortage emerges as a high issue? Being cheap is a commonly suggested excuse for the high demand for foreign labors. A critique of political economy from Marxist tradition provides an insightful clue to the reasons why foreign labors are mushroomed in the past ten to twenty years. The separation of production and social reproduction, an institutional result of foreign labor policy, explains why foreign labors could remain cheap at a level unacceptable to local workers. But other that being cheap, foreign labors serve socio-political purposes that did not receive attention among the existing literature in Taiwan. To be specific, foreign labors help stablize the social relation of production and further aggravate the already tilting imbalance of worker-employer relationship that leads to the even more silence of the labors. This aspect of socio-political implications is the key to the reproduction of capitalist production.