The top B schools only help in securing good placements (gr8 packages). The top 10% of the B school will move out and the rest whose intellectual level is same or worse than the other B school ctudents secure placements at good companies in India on the basis of their B school brand name. Only performance and hard work makes one stand out and move up the ladder in the corporate world. But there are still many companies who short list candidates based on the B schools they have attended rather than the experience of the person.
