With diamonds worth Rs. 100 crore, two kilos of gold, crores in cash and 20 properties to his name, Yadav Singh is one of the richest men in Uttar Pradesh. He is no businessman, just a government employee. Mr Singh, who is a chief engineer with the Noida Authority, has become an embarrassment for the state government after raids over the weekend revealed his fabulous wealth - virtually impossible on a government salary.