Sreyanth, 

The reason why the fees is high is because IIITD is a self-sustained and has a government lease, which it has to repay. IIITD current campus, that might seem complete, is actually only Phase I. The construction for their next phase has already started.

Therefore, being self sustained and having to fund construction, maintenance, equipment and salaries are fees naturally is high. As far as I know, an increase can be expected till the lease hasn't been payed completely.

Hope it helps.