Via the ever-fascinating Tim Taylor, who blogs at Conversable Economist, here's a table on child poverty. It shows the fraction of kids who would be poor before taxes and transfers and the fraction afterwards. As you can see, in the UK for example, that fraction is massively reduced, since the system so favours families. As Tim notes in the US its about the same. What's that country at the bottom? Its the only place where the system makes kids worse off.