"Reservations for SC/ST was introduced in a different context. It was provided for in the Constitution to remedy the historical injustice done to them. It was our responsibility.
"So, reservation for them has been there since the inception (of the Constitution). But, even Ambedkar has said its continuance in perpetuity is not good. There should be a time limit to it," Vaidya told an interactive session at Jaipur Literature Festival.
RSS chief Mohan Bhagwat's similar remarks about the need for a review of the reservation policy, just ahead of Bihar polls, had cost the BJP dearly as it saw a massive consolidation of the electorate from the backward classes and weaker sections in favour of Nitish Kumar-led grand alliance.
RJD chief Lalu Prasad and Kumar had then raised an alarm, insisting the BJP would end reservations if voted to power in the state.
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"Modiji your RSS spokesman is again talking rubbish about reservation. We drubbed you (ragad, ragad ke dhoya) in Bihar, but probably more remains to be done which UP will," the RJD boss said in a tweet in Hindi.
"Reservation is something which has been granted by the Constitution. It is not a charity from a casteist organisation like RSS. We know how to show them their place," he said in another tweet.
"RSS-BJP's anti Dalit agenda exposed by Vaidya's call to abolish reservation. Caste & communal division is their dna", party's chief spokesman Randeep Surjewala tweeted.
As he faced criticism over his remarks, Vaidya went on the defensive, saying as long as there is discrimination, reservation should continue. He, however, sought a time-bound probe into why its benefits had not reached the targeted people.
"As long as there is discrimination in the society, reservation should continue. We should end discrimination as soon as possible. But there should be an unbiased probe into why the weakest of the weak did not get the benefits of reservations so many years after independence," he said.