The main purpose of this legislation is to eliminate the requirement that Social Security benefits be included as taxable income. This change aims to reduce the tax burden on seniors who rely on these benefits for their income. The key provision of the legislation is the repeal of the current tax treatment of Social Security benefits. Specifically, it amends the Internal Revenue Code to state that starting from the year the law is enacted, Social Security benefits will no longer be considered part of a person's gross income for tax purposes.