The issue is of Demand and Supply. All IIM's have total seats comparable to say Harvard Business School. For IIM's more than 2.5 lakh students apply for less than 1500 seats. Does 99.0 percentile is way different from 94.0 percentile?
All those how got through IIT/ IIM go on accerlated growth path. The campus placements also show high demand from employees but short supply of candidates.
See our AIIMS- How many seats they have?
We have more then 50% population in young age group. They are smart, intelligent and hardworking. If they are not economically sound , loans from bank can be availed.
The limited seats are only helping coaching institutes where students start preparing as early as possible to beat the competetion. Interestingly, many of the faculty members of there center of excellence do teach or run coaching institutes.