Around the world, market forces low interest rates, longer lives, workers changing jobs are testing underfunded pension plans. We explore how the world should rethink financial security for aging populations. The Netherlands offers one solution by taking on more risk for younger populations. Economist Teresa Ghilarducci explains why countries like the US have kicked the can down the road, while Dutch experts Adrian Rikjen and Stan Veuger highlight how a pivot toward defined contributions could make the system sustainable.