Often it's not so much that the billion dollar program was created to make defense contractors rich. It's that the attitude of the US military and intelligence

Often it's not so much that the billion dollar program was created to make defense contractors rich. It's that the attitude of the US military and intelligence agencies is that if it's worth doing, it's worth overdoing. The defense and intelligence contracting industries simply aid, abet, and exploit that propensity to enrich themselves. So where a simple and cost effective solution would work, the US Military/Spy Agencies would want a platinum-plated solution that would give them total dominance in the situation at hand, which would spiral the costs and complexity to the point that the solution doesn't work at all. Contractors are never going to be a brake in that situation because it makes them filthy rich. And any employees who object get swept aside because the powers that be want to pursue the most aggressive and ambitious solution possible.