People dey always dey talk say power corrupt, power corrupt, yes most of us don talk am before, we dey think say na power dey corrupt person but the truth be say most of us already get corruption inside of us we only need the opportunity (power) to bring out the corruption in us. A man once said if you really want to know the person true self give him 3 things: Money, Power and Access to Sex. With this 3 things you can know any one true nature. So no be power dey corrupt, power only reveals corruption.
You are not wrong but this thought of yours can't be termed to everyone because human nature varies and differ to some extent and I believe not everyone will fall to this corrupted mindset of given the things you listed but to a large extent I do understand that the human nature is filled with greed but even at that the nature of upbringing and morals matters because that can change his mentality of corruption mind