What is This!? A School for Ants?

They say ants can lift 5 times their body weight. So why does it seem that every time I see a dead ant, 2 or 3 of those little buggers are struggling to drag just one dilapidated exoskeleton. Is one doing all the work while the others simply follow and mourn the death of a fellow slave-driven colleague? Or have we been lied to all our lives, somehow finding ourselves immersed in a vast conspiracy involving the mainstream world of science and a couple of Scandinavian dwarfs?