if u see the movie periyar u will see that he was not interested in education and as per dravida standard did not go beyond 3rd standard. he was actively engaged in visiting brothels and bars and also suggested how to correctly "maintain" their business. this is his mental background. the only reason he took up the temple entry issue was to get support of these people for his justice party which was prmoted by the british against the congress (not todays congress) this was politics then and politics now. actually the people who benefitted from the reservation are the the rich obc like mudaliar, naidu, naicker (periyar caste) etc and NOT the sc & st