Why are priests called the coworkers of the bishop?

Originally there were only Bishops which is why St. Paul only addresses Bishops and Deacons with St. Timothy in Scripture. As the Church expanded growing in size the Bishops needed assistance but they wanted to control whom would be ordained so a distinction was made between Bishops (Chief Priests) overseeing the duties of their Priests whom were given the authority to preach His Gospel and administer the Sacraments. The word "co-worker" is appropriate being they they are their peers the only exception being that a Priest can not ordain.

Several different things make up a culture like, how the people worship, their form of government, geography, and trade. religion is one of the most important things to a culture, it defines peoples life. their different beliefs form into festivities and events that merge with their culture. people that practice hinduism see cows as gods, so no doubt they would celebrate cows, and these celebrations would definitely merge with their culture. those that are buddhist live life trying to reach a certain level of peace, so no doubt would they change things in their life in order to correspond with their religion.

They were eliminating problems caused by industrialization, urbanization, immigration, and corruption in government