So they need help doing a different type of job/position, lets say unloading for an example and they determine they will use a preloader to help. Technically they are supposed to ask the most senior preloader on down to the least senior employee if they what to unload, then if they do not get a volunteers they can force the bottom preloader to go unload. It does not matter who's cages are the cleanest or heaviest, but if yours are the cleanest and you have the seniority to avoid unloading they can make you help cover the preloaders area that goes to the unload.