I dont think you are correct. Discrimination will continue forever. At no point of time, today's forward castes would come under the ambit of backward classes simply because we are a part of democracy. Politicians will only favor to "make" those communities backward which are a sizeable votebank. For this reason, you see yadavs, jats, kapus, vanniars, banias are backward, even though they are economically and socially better off than their so called forward caste counterparts.
For this reason, politicians are also clamouring to include muslims in this list.