By analyzing the transformation from Labor Standards Act to Labor Pension Act, this article explores how the idea of social security failed to be materialized. The idea, sustained by the labor movement in the early 90's, was defeated by the Neoliberalism, in the way which 'individuals-in-market', rather than solidarity within working class, became the principle in the enactment of Labor Pension Act. Three different dimensions have been stressed to explicate this defeat. First of all, it shows that the idea of social security encompassed ethnic-nationalist imagination, an imagination with exclusion that jeopardized the fundamental of solidarity. Secondly, from the perspective of class politics, it pointed out that, while the state was forced to align itself with the capital, the labor movement failed to go beyond its own historical restriction of corporation-unionism and, as a result, lacked the power against the Neoliberalism. Finally, since DPP gained the power in 2000, some campaigners in the labor movement were, to some extent, incorporated into the regime whether deliberately or not, and disconnected themselves from the movement; as a result, the idea of social security lost its foundation, and played trivial role in the enactment of Labor Pension Act. Through this historical review, this article shows the various conditions of the Neoliberalist victory in Taiwan.