That's the point o: They don't have anything to show that they've done work on it, which means that some people will think that they're NOT doing any work on it.
So like, if you ordered a muffin, and you sat down at a table and waited for the muffin. You look at the waitress, and she's pouring coffee for someone. It's not like you know that in the back kitchen there's chefs icing your muffin for you xD