The paper discusses the problem of the socio-economic inequality and its regulation in the developing countries putting it into the context of the international development. At first, we put forth on some arguments: e.g. why should one care about inequality dealing with the poverty-growth-inequality triangle, the inequality-on-growth effects, and the globalization-on-inequality impacts. At second, regarding the mechanisms of the inequality regulation, we state a limited role of the progressive taxation in the developing countries, where the most of the redistribution occurs through the social spending and other welfare programmes. A scanty government budget in many poor countries needs to be supplemented with the additional development resources. However, the channels of the international redistribution are currently underused.