The aim must be in the creation of real local economies that can provide the needed income for the population and soon also create the needed tax-income base for the state to build the education-system, health care and social security this growing economy needs to sustain itself.
However all this needs to be coupled tightly into a tight policy of population control, as no real economy can create jobs in the rate population now grows in many of the developing countries.
Here we however stumble into brick-wall created by dogmatic religions and also multiculturalists who want us to accept the right of the religious leaders to do what they please. Even trying to discuss these matters leads easily to silence.
The multiculturalist dogma creates a trap where all discussion of the negative effects of local traditions, customs and religions is forbidden and in effect all solutions for the problems of the developing world need to come from outside.