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In most low-income households of retirement age , Social Security represents 80 % or more of their retirement income . But this apparently simple response is actually the result of a series of complex computations carried out by the brain , that would be impossible without the two highly visible flaps of cartilage we call ears . Hispanic Americans are also less likely than whites to have pensions or other sources of retirement income , so Social Security benefits are integral to their retirement security . Since poverty rates among African Americans are higher and they are less likely to have other sources of retirement income , they depend heavily on Social Security benefits as a base of income . You talked about how it was kind of overwhelming , Betty . The story of how Britain ’ s retirement system reached its current crisis began 25 years ago , when Margaret Thatcher ’ s Conservatives swept to power on a tide of national disgust at high unemployment , high taxes and poor services . Also of note in Peru , the Shining Path guerrilla movement has revived a cadre of nominally 500 members . offers a timely , comprehensive research guide that covers the literature of national security and intelligence policy and spans governmental and scholarly resources ... Social Security benefits received in the first year of retirement as a percentage of the amount of earnings in the last year of employment .