I am just 38. For this living memory of mine I have been denied opportunities because of quota.
So who is reponsible for this 38 years :)
It was 'Vivekananda' in his famous speech in 'Chicago' dwelled on 'punarjanmas'. So one upper caste this life, could very well be lower caste next life and vice versa.
So who is reponsible for what ? It could very well be possible 'Karunanidhi' himself was an oppressor in some previous 'janam' of him :)