Medicare is a type of involuntary benefit introduced by the Social Security Act of 1935. Along with retirement (Social Security), these mandated benefits are subsidized by a tax on both the employer and the employee called FICA (Federal Insurance Contribution Act). Vision, retirement and sick pay (A, B, C) are all examples of voluntary benefits that employers may choose to offer their employees. Which of the following Acts remains a major influence on basic compensation issues for businesses in the United States? "