Corruption is always the problem on most country that has high poverty. The wealth is being funneled to the few people(rich businessmen and politicians) while the workers and normal citizens are still poor because the tax they are paying that was supposed to improve their country economy is being corrupted by politicians.
With right leader and people mind set to improve their country, everything is possible to achieve.
Communism was born because of injustice between rich and poor due to corruption.
Also most of the workers and normal citizens tend to be even poorer as the time goes unless they are making a 180° shift in their lives work-wise. Promotion with big pay rise, changing jobs or going abroad.