The role of coordinator was called the butcher. All private slaughtering was prohibited and only the butcher was allowed to slaughter. This prevented excess slaughtering. This role was gradually invested with more and more importance. In fact is became a sacred job and anyone slaughtering privately was deemed a violator of the religious law and a offender to God. To further discourage the common people from slaughtering on their own, the task of slaughtering became more complex involving certain parts being burnt for God and blood being sprinkled. The butcher, or priest as he would have been called by this point, was given a share of the meat for his own consumption. Thus it was sealed that no layman would slaughter his own animal if he feared God in the least. He would have to bring his animal to the priest and only then get his share. To do otherwise would be stealing from God his portion and from the priests their portions.
As the tribe became a nation, it became less important to centralize the slaughter since there were so many people. Thus non-holy slaughter was permitted. But the priestly role and rite persisted.