UNITED NATIONS (Reuters) - Callous wealthy nations are indifferent to the plight of the poor as they pursue selfish policies which enrich the few at the expense of the many, South African President Thabo Mbeki said on Tuesday. "These billions of poor people are increasingly becoming impatient because every year they hear us adopt declaration after declaration and yet nothing practical is done to assuage the hunger pains that keep them awake at night," he told the United Nations General Assembly. At the Millennium Summit in September 2000, world leaders at the United Nations agreed a series of goals to...