I'm not sure about the last sentence. India had a literacy rate of 16% when the British left and education was monopolized by non-Dalits/SC/STs AFAIK. Do you have numbers?
The leaps and bounds of improvement in lives of lower caste people is one of the primary reason why casteism is not going away. Unlike racism, anyone can claim to be of any caste and there is literal riots happening to be classified as lower caste so that people can claim the benefit. As I said, I don't plan to start an argument here but you are lying and you should tell us why.