There is some other country which economic condition is very poor internally some huge rich monster holding 80% of treasury in those countries but others people are very poor but this country showing Avg income normal. But actually they are not
That is why people should take in consideration the reality and practical experiences instead of statistics more often when trying to reach a conclusion about something. Average income doesn't reflect the real average financial conditions of a country and at same time it's a tool used by the powerful ones to lure people from the country and outside the country to believe the situation there is better than it looks, so there won't be further complains and people will stay pacific, while foreigner observers will be satisfied with the results presented.
Actually, what you mentioned above is probably happening in whole african continent and in at least 80% of latin american countries right now.