Alas, that won't help, as this graph compiled by statistician Simon Hedlin shows. The total dependency ratio (children and retirees, compared with those of working age) fell in all G20/OECD nations bar Germany and Sweden between 1960 and 2010. In the next fifty years, it will rise in all those nations, bar India and South Africa. In most nations, the ratio will rise by 40% or more; there are huge increases in dependency in parts of Asia (China and South Korea) and in eastern Europe. Britain and America are towards the bottom of the table, but their problems are big enough.