People who work will work without reservation also. People who do not want to work will not work, provide them reservation as much as you can, they are not going to change.
What is the fun in having a life, living on things one does not deserve for? A better idea is to enable the backward people, not the class by birth, provide the means to learn and grow. Provide them free learning material.
Reservation only separates people. People who get the reservation, try to hide to hide their growth story afterwards for respect among peers for rest of their life.
People who can agitate and spoil the whole system cannot be called backward or helpless. So, is the democracy a glorified but weak form of government?