Why, ruling over the indigenous peoples, the Persians tried to rely on local authority? What consequences could this have?

At one time, the Persian Empire was a huge state, many tribes and peoples were subordinated to it, which it conquered. The main task of all Persian rulers, in this case, was the correct administrative organization of the country. When the Persians put indigenous power at the head of the captured tribes, this made it possible to develop more confidence among the people and avoid possible uprisings. After all, bribing several rulers was much easier and cheaper than throwing troops on the rebels.