What is the point searching houses by the CBI. The real booty of all these guys ( I am sure they are smart enough ) must be stacked eksewhere. If CBI finds 1 crore in a house, then he must have stacked atleast 20 to 50 crores elsewhere.
Any guy who has to be raided, must be kept under close surveillance for atleast 6 to 12 months so that all his hideouts are known.