Arora: So economic backwardness is an included facet in 15 and 16.

Arora: Reservation is limited to a certain few. The people that have been left out cannot be not given reservation. That is an alternative argument.

Arora: Therefore, summing this part up, nature of disadvantage that reservation targets is group based and is entrenched and cannot be overcome by individuals.

It's class based, entrenched, cannot be overcome by individual effort or by getting lottery, jobs.