The latter argument that advocates an economic criterion in extending reservations for Dalits falls short on at least two counts.
First, affirmative action for SCs and STs is based on the recognition of "identity" of being an untouchable or adivasi, as opposed to "backwardness," which was the sole criterion for OBCs (Other Backward Classes) reservations.
Inclusion of castes and tribes under the Presidential lists as per the Constitutional provisions is in itself a testament to their undisputed backwardness.
While poverty certainly emanates from social backwardness, the reverse is not necessarily true and the stigma of identity is, in Rohith Vemula's words, a "fatal accident of birth" that perpetuates unabated even in the face of one dimensional advancement.