Social Security Trust Fund Integrity and Benefits Improvement Act of 1991

Social Security Trust Fund Integrity and Benefits Improvement Act of 1991 - Title I: Benefit Improvements - Amends title II (Old Age, Survivors and Disability Insurance) (OASDI) of the Social Security Act to: (1) increase the amount of outside income which beneficiaries who have attained retirement age may earn without incurring a reduction in benefits; (2) increase survivors' benefits for those widows and widowers whose spouses died before they reached age 65; (3) repeal provisions which require that a widow or widower must have become disabled within seven years of their spouse's death or within seven years of the end of their eligibility for benefits as the surviving parent of a young child in order to be eligible for disability benefits; (4) raise the social security payroll tax exemption for State election officials and workers, and index the exempt amount beginning in 1993; and (5) increase the OASDI contribution and benefit base on a graduated basis beginning in 1992.

Directs the Comptroller General to conduct a study and report to the Congress on the disability determination process and the appeals process applicable to disability determinations under the OASDI program and title XVI (Supplemental Security Income) (SSI) of the Social Security Act.

Title II: Clarification of Budgetary Provisions - Amends the Balanced Budget and Emergency Deficit Control Act of 1985 (Gramm-Rudman-Hollings Act) to exclude the appropriations for the administration of the Federal Old-Age and Survivors Insurance Trust Fund and the Federal Disability Insurance Trust Fund from Federal budget deficit calculations and to exempt such appropriations from sequestration under such Act.

Title III: Social Security Administration - Amends title VII (Administration) of the Social Security Act to establish the Social Security Administration as an independent executive agency. Transfers to the Administration all functions carried out by the Secretary of Health and Human Services pertaining to such programs.