Taking the other side of the scam coin there are construction projects that are over engineered out of all sense of proportion simply to increase the budget and

Taking the other side of the scam coin there are construction projects that are over engineered out of all sense of proportion simply to increase the budget and associated flow throughs like skimming or powerbase increases etc. And that's operating under the assumption the project is useful at all in the first place which is by no means a forgone conclusion especially in contrast to other possible devotions of time and energy.