You know the caricature of the consultant as the conman? The guy who takes your watch to tell you the time and then keeps your watch as fees?
Getting Drunk in First Class is the hilarious and saddening blog of such an (anonymous) consultant. Read it to know what really some consultants are thinking as they give you those jazzy presentations, for example:
The scope of work is simply a umbrella “cover your ass” statement. It more or less states what the consultancy will do but more importantly, what they will not do. Also, if you read closely, the statement of work usually has some clause that “we are ultimately not responsible for anything, no matter how bad we fuck things up.”