What is the Islamic ruling regarding intermediaries, and are they permissible? For instance, if I seek a job, admission to a school, or similar services through an intermediary, what does Islam say about this practice?

Question

If seeking someone’s intervention for a job opportunity may unjustly deprive a more qualified individual of that position, it becomes impermissible as it infringes on the rights of the deserving candidate. This practice would also hinder the organization, denying them the services of a more competent individual and impeding progress in that field. However, if the intervention doesn’t impinge on anyone’s rights, it remains permissible.