Should I advise you? This kind of discussion should be written in your local thread for effective discussion. Though I don't know your country, nevertheless, you sound like a typical Nigerian. What you wrote will be strange to many people, even to those people living in a poor country because the corruption allegation may not be so obvious/pronounced as much as you alleged in their countries.

Regardless, the two points I can bring out from your allegation are; 1. The change of the currency design and 2. The stealing of infrastructure money.

For the first part, you are so wrong, and it shows that you do not understand economics and national security. Without writing stories or mincing words, just research how many times the USA and some other top countries have changed the face of their currencies in the past 2 decades. You should also research the reasons for that so that you will be rightly enlightened about this.

It is a very good move and a standard international measure if you must know, which reduces counterfeiting, and hoarding, enhances security, and ensures the right monetary policies by ensuring the notes in circulation are truly what the economy needs among others.

As for the second part, if the country leaders are corrupt, of course, infrastructure contracts are the avenue they can hide under to steal. They will inflate the cost in connivance with the contractors. This is a serious problem in corrupt countries.