Another critique of restorative justice suggests that professionals are often left out of the restorative justice conversation. Albert W. Dzur and Susan M. Olson argue that this sector of justice cannot be successful without professionals. They claim that professionals can aid in avoiding problems that come up with informal justice and propose the theory of democratic professionalism, where professionals are not just agents of the state – as traditional understandings would suggest – but as mediums, promoting community involvement while still protecting individuals' rights.