one reason is that nonregular workers have less access to social insurance benefits oecd another is that prevailing norms limit the use of the social insurance system for example women are still expected to leave employment upon having a child rather than using parental leave provisions while fathers fear the career repercussions of making use of their entitlements oecd takeup of social assistance benefits is lower in korea of the working age population is covered by the basic livelihood security programme than in any other oecd country and far below the oecd average at oecd