Historically, Jai system has classified people based on profession and status. Each Jati is connected with a particular profession. Persons born in particular Jati are supposed to do the work of only that Jati. The Jati rules don’t allow them to choose other jobs. In the same way; in the stratification of classes, their Jati will have a particular slot.
Another feature Jati system is the differentiation between social status and economic status. For example, Brahmins who have high social status are under kings or rulers who belong to Kshatriyas in nonreligious matters. At the same time kings, in spite of their wealth and power, are under Brahmins in religious matters like pooja and other rituals.