[영문]The stagnation and retrenchment of social policies in recent decades raise considerable interest and concern in writings on the welfare state. This study examines differences in the development of means-tested benefits and social insurance provisions. Questions relating to the measurement of policy retrenchment and the vulnerability of social benefits are addressed. Two conflicting hypotheses are discerned: one stating that the development of means-tested benefits resembles that of social insurance; and another more recent one claiming that the evolution of means-tested benefits follows a unique pattern. The empirical analyses are based on institutional data on the level of social benefits. It is shown that social insurance stands a better chance of surviving periods of retrenchment and that the greater vulnerability of means-tested benefits is related to the organization of social insurance provisions.