Most Undertaker's take on the job for the excessive pay, and easy access to bodies of the recently deceased. Profit drives these otherwise jobless individuals. Or perhaps they are simply morbidly curious.

As an established undertaker, you can rely on certain benefits that membership provides. Your fellow undertakers will provide you with lodging and food if necessary, and pay for your funeral if needed. In some cities and towns, a church or temple offers a central place to meet other members of your profession, which can be a good place to meet potential patrons, allies, or hirelings.
Churches often wield tremendous political power. If you are accused of a crime, your church or temple will support you if a good case can be made for your innocence or the crime is justifiable. You can also gain access to powerful political figures through the temple if you are a member in good standing. Such connections might require the donation of money or magic items to the guild's coffers. You must pay dues of 5 gp per month to the church. If you miss payments, you must make up back dues to remain in the church's good graces.