Bread and jam may fill you up but...
It's lunch time and you pop out to find something to eat. Out in the big, smog filled city you have as many options as you like. Junk food malls, top slot restaurants, niche eateries serving food from almost every country; so much choice. And then you get the waft of fried onions and garlic that only an Indian restaurant seems to have perfected and you make your way for your favourite lunch time Indian feast.
As you arrive at the door, a little man appears just like the little man does in Mr Ben in readiness to take him back from his travels and into his normal world. He sees you are hungry and offers you a jam sandwich and glass of tap water. "This will do the job sir, carbohydrates to keep you energised and water to hydrate you". (Look, the Atkins diet wasn't around when Mr Ben was created). But guess what, he may be right but he's not exactly appealing to your empty stomach with a gastronomic wonder is he so you brush him aside, regardless of his remonstrations, and continue on your mission.
Fish don't like worms much either. Why else do fishermen colour their maggots, throw special mixes of food to attract the fish, even spend money on pretend colourful flies to attract Mr or Mrs Big Fish. Worms no longer hit the spot!!
And guess what, job descriptions are no different. Why do agencies seem to do better than employers on the same role that the employer has little response for? They take the bread and jam and either add something to it like fillet steak or, throw it away and get Gordon Ramsay the recruiter to work his magic and craft something much more tasty to tempt them in.
Now, it may be after your Indian delight that the next day you wish you had have taken the jam sandwich but then again, it may have been the delightful meal you had hoped for. Point being, once you are through the door you are more than likely to eat rather than leave. And as long as employers keep using job descriptions, agencies will keep on getting the easy option.