Diệm's rule was also pervaded by family corruption. Can was widely believed to be involved in illegal smuggling of rice to North Vietnam on the black market and opium throughout Asia via Laos, as well as monopolising the cinnamon trade, amassing a fortune stored in foreign banks. With Nhu, Can competed for U.S. contracts and rice trade. Thuc, the most powerful religious leader in the country, was allowed to solicit "voluntary contributions to the Church" from Saigon businessmen, which was likened to "tax notices". Thuc also used his position to acquire farms, businesses, urban real estate, rental property and rubber plantations for the Catholic Church. He also used Army of the Republic of Vietnam personnel to work on his timber and construction projects. The Nhus amassed a fortune by running numbers and lottery rackets, manipulating currency and extorting money from Saigon businesses. Luyen became a multimillionaire by speculating in piasters and pounds on the currency exchange using inside government information.