The Korean economy is now facing many challenges such as jobless growth, bi-polarization and shrinking growth potential. This arouses new demand for social policy. In the course of implementing more proactive social policy, however, tensions among policies are growing, and policy collusion based on the policies discord is often observed, which hinders successful and effective implementation of policy. In order to find out better ways of harmonization of social and economic policies and consensus building in the course of policy implementation, this study aims at deriving implications from the experience of the advanced countries who have suffered from the problems of policy discord and policy collusion. (The rest is omitted.)