CAG is over exaggerating things. This is what happens when accounting ppl who don't know have field experience try to evaluate things.
The value of by-products taken by CAG is of too extreme amount. The by-prodcuts market value fluctuate a lot which even a rice miller can't estimate. Sometimes they raise 200% in a month and same time goes to 25% of value the other month.
The major scam is going on other side i.e the p.d.s distribution side. There are many ppl who buys this p.d.s rice from distribution ppl at Rs.2 repolish it and sell it for around Rs.10. This is a major scam.
& there is other scam. Officers who give paddy for custom milling directly asks millers to take a kilo extra(101 instead of 100) while taking paddy and share that amount with them.