I believe this is actually the major problem faced by outsourcing projects. When I was in the cable industry, I saw several projects fail when the "Systems Engineers" (who were in charge of writing the specifications) were unable to convey enough information to the developers.

There's a real limit to the amount of "truth" you can put into a specification, and at some point you have to trust the developer to "do the right thing". If they don't have domain knowledge in the industry they're writing for, they don't stand a chance ... and so your project fails even when everyone works hard and has good intentions.