Money!
To coin a phrase, this guy's mint became the same guy's prison. http://news.bbc.co.uk/2/hi/asia-pacific/5101488.stm - no more mint juleps for him!
How he managed to steal so much makes the mind boggle. When I was a schoolkid, I visited the Royal Mint, when it was at Tower Hill, in London. I can assure you that each worker had to give a rigid account of the metal-in to metal-out for each shift. The scales used for this were ultra-precise and I was told that a discrepancy of one farthing (1/960th of a Pound Sterling) had to be accounted for.
How he managed to steal so much makes the mind boggle. When I was a schoolkid, I visited the Royal Mint, when it was at Tower Hill, in London. I can assure you that each worker had to give a rigid account of the metal-in to metal-out for each shift. The scales used for this were ultra-precise and I was told that a discrepancy of one farthing (1/960th of a Pound Sterling) had to be accounted for.