Pensions are one of the pillars of the welfare state, but more and more experts are warning about the challenges that threaten their sustainability. The aging of the population, the drop in the birth rate and changes in the labor market have reopened the debate on the future of retirements in many countries. Is the pension system really in crisis? Will there be enough money for the next generations? And what alternatives exist to guarantee a decent income during old age? In 5 minutes we will explain it to you.