Focusing on the developing economic challenges confronting Korea and the US in response to the aging of their populations, this timely book examines how public policies are evolving in light of demographic changes, the impact of aging on governmental expenditures, and transitions in the labor force associated with aging. International contributors comparatively analyze government approaches to population aging, illustrating the similar challenges faced across nations. Chapters draw attention to those particular issues that public policy plans must surmount, including funding pressures on retirement plans and the effects of an aging labor force on economic growth and productivity. They offer evidence on the scale of these challenges in Korea and the US and empirically evaluate how governments, employers, and individuals may respond to these issues in the years to come. Addressing fiscal sustainability and key social security programs, including the implications of the 2015 Korean pension reform and the economic difficulties entailed by the future of Medicare, this book investigates the implications of managing and sustaining welfare for an aging population. This cutting-edge book will be ideal reading for economists focusing on public policy and welfare programs, benefiting from the comparative approach to fiscal accountability and sustainability. It will also appeal to practitioners and policymakers seeking insights into the consequences of an aging population and hoping to develop innovative methods and approaches to welfare.