Divide and Rule 

The quota will actually not benefit the OBCs who have talent but don't have the financial resources to prepare for the fiercely competetive admission process for the IIT. And what about the Brahmins caught in poverty and the OBCs with multiple cars? Now, the former will remain poor and the latter will buy even more cars. 
There is no doubt that OBCs etc. were discriminated in the past, but quotas based on economic status are more fair. But not only quotas, the government should provide the financial resources need for IIT preparation to students from disadvantaged backgrounds. 
These quotas are doubtlessly aimed at dividing the nation, and keeping the Congress in power. Our politicans have imitated the Divide and Rule policy very expertly from our colonial rulers.