For the purpose of establishing a national program to provide supplemental security income to individuals who have attained age 65 or are blind or disabled, there are authorized to be appropriated sums sufficient to carry out this subchapter.

Every aged, blind, or disabled individual who is determined under part A to be eligible on the basis of his income and resources shall, in accordance with and subject to the provisions of this subchapter, be paid benefits by the Commissioner of Social Security.