I have never seen them consultants that provide a value commensurate with the prices they charge. They seem more like a proxy for fraud. When I worked at PayPal, there was a director who had an army of Deloitte consultants who just so happened to be from her husband's team at Deloitte. It was a clear conflict of interest and even though execs were aware, nothing was ever done. I imagine that's going on all over the place.