We should demand that all types of subsidies be scrapped.
Start a fresh, and give them to the really needy without their caste or religion being looked at.
There is Regional Variation in subsidization at present.
It should not be a state matter. Only a central matter with states helping to put the new policy in place.
Let's draw more specific distinctions between those considered "backward" today and those considered less so, or "have ceased to be backward". Then let's stop calling anyone backward, only needy.
That would be true affirmative action for all really needy and / or those that we did not give benifits to earlier.