Unemployment at B-Schools

In the wake of ongoing economic crises, MBAs at Some of the top B-Schools in India are facing job crunch. The so called dream jobs which were in abundence till last year have suddenly vanished. Whats the reason behind it? Well I feel more than shortages and a fall in, what we call in economics-"aggregate demand", it is the reversal of business expectation that has led  the hirers to take a back seat.