In India the lowest members of the caste system are called the Untouchables. People who are members of this society are usually born into this society and never reach a higher level. These people live a horrible life of poverty, discrimination, and are considered outsiders in thier own homeland and society. Those who associated with the untouchables that are members of the higher caste system can be punished for participating in certain activities with the untouchables.
The jobs that the Untouchables had were some of the worst. They would be forced to have jobs that associated with humand and animal waste and dead carcasses. These people were already considered polluted so they would not become more polluted by coming in contact with these things.