Yes, reservation is a concept devised to benefit or favor those communities and groups who are disadvantaged and denied otherwise. It was introduced with the purpose of helping those who could not help themselves. Constitutionally speaking, there is nothing wrong with such an arrangement by the government for the upliftment of its people.
True that reservation is benefitting only limited groups of people. What is also true is that the rightfully deserving and needy people from those limited groups are not benefitted. It is only the high-end people from the reserved categories, the majority of whom now have the resources as well riches to sustain education without reservation, who are exploiting the system. The wrong comes when within the reserved categories the benefits don’t reach the weakest and the lowest.
How can you possibly decide a person is at a disadvantage than others because he or she is, say, a Yadav? I have four SC friends who are equally or richer than me! They’ve all studied with me, taken the same classes as me, and received the same treatment as any other student. But my maid could not get her children to study in a college. Some of them did not even complete school.
Why, even in the 21st century, there still exists caste discrimination? Why is there a caste bias, caste favouritism? If reservation benefits only a handful, it may as well. But help should be given to those who need it more than those who ask for it. There is no point of the reservation if its benefits are not reaching the truly deserving people, like any poor person who cannot afford education irrespective of his/her caste.