The Economist has not quite analysed the situation in developing countries correctly:  http://www.economist.com/news/international/21638333-developing-countries-have-started-weave-social-safety-nets-heres-how-they-should-do-it?fsrc=scn/tw/te/bl/ed/helpingthepoorestofthepoor

The problem developing countries face is lack of trust within society.

The well-off are not willing to help the less well-off because they do not trust the government to allocate the money fairly (or indeed, at all).