Since he signed off on this, it's on him to be investigated.
That's what corruption is.
Of course, if you want, you can cover it up in red tape and make it look like incompetence.
First sentence:
> Corruption is a form of dishonesty or criminal offense undertaken by a person or organization entrusted with a position of authority, to acquire illicit benefit or abuse power for one's private gain
That's what corruption is.
And experts are also no argument, as there are always experts saying this and that which you can call on later for eny kind of complain.
Neither you nor me are informend enough to say whether it was corruption, biasment, incompetence or something else. We don't even know whether it was good or bad for history. 30-40 years are a long time for technology and infrastructure.
Is that also not corruption but incompetence?