Social Security Trust Funds Protection Act - Makes those amounts, equal to taxes on employees and on self-employment income as well as taxes attributable to Social Security and tier 1 railroad retirement benefits, which are made available to the Federal Old-Age and Survivors Insurance Trust Fund and the Federal Disability Insurance Trust Fund, available solely for the purposes of the Old-Age, Survivors, and Disability Insurance (OASDI) program under title II of the Social Security Act. Declares that such amounts shall not be available for the establishment or funding of private accounts.