India's first constitution, in 1950, banned discrimination on the basis of caste. "Scheduled Castes" and "Scheduled Tribes," the lowest in the caste hierarchy (and thus historically disadvantaged) were addressed by the government through the creation of quotas in government jobs and educational institutions.
In 1989 these quotas were extended to include groups called the "OBCs" (Other Backward Classes), which fall between the traditional upper castes and the lowest. Altogether, the SCs, STs, and OBCs make up over 60% if India's current population. Their quotas stand now (2017) at 49%.
In urban areas, the influence of caste has declined, but it is still present. Governments may be able to change the law, but they cannot change the culture as easily. As recently as 2015 there were violent protests against the quota system