No better way to summarize it than you just did and it's funny that you're so accurate despite not being from there.
Although it's a normal occurrence in so many countries, Nigeria seems to be leading the group in terms of the world's most corrupt and greedy leaders.
It's sad that the country is backward and experiencing poverty despite their rich supply of oil and other agricultural produces, but again you won't expect less when the country is being plagued by insecurity.
 Before a country can be stable and the economy can work smoothly, all these factors; security, agricultural sector and even by extension the currency should be functional but when you have corrupt and greedy leaders who are more concerned about filling their pockets and that of their generations yet to come, you'd see these areas being neglected or in some cases, manipulated for their benefits, so how then will the country move forward?