Social Security benefits are the major source of income for most people over age 65, according to the Social Security Administration. That means living standards in later life can depend heavily on how well retired workers and spouses understand the program. Unfortunately, misunderstandings are all too common. A recent survey from Nationwide Retirement Institute found that 44% of adults were unaware that, upon the death of a spouse, the surviving spouse would inherit the bigger Social Security benefit. Social Security old-age and survivor benefits is a broad term that includes two subcategories: retired-worker benefits, and benefits for spouses and other...