How was the position of a person working off a debt different from that of a slave?

A person who fulfilled his duty became a full-fledged member of society. A slave could work his whole life and remain a slave. Could be sold. He had no property. Temple slaves were an exception. They had privileges.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.