MR. JUSTICE HARLAN delivered the opinion of the Court.
…Appellee, an alien, immigrated to this country from Bulgaria in 1913, and became eligible for old-age benefits in November 1955. In July 1956 he was deported pursuant to 241 (a) (6) © (i) of the Immigration and Nationality Act for having been a member of the Communist Party from 1933 to 1939. This being one of the benefit-termination deportation grounds specified in 202 (n), appellee’s benefits were terminated soon thereafter, and notice of the termination was given to his wife, [363 U.S. 603, 606] who had remained in this country. 2 Upon his failure to obtain administrative reversal of the decision, appellee commenced this action in the District Court, pursuant to 205 (g) of the Social Security Act (53 Stat. 1370, as amended, 42 U.S.C. 405 (g)), to secure judicial review. 3 On cross-motions for summary judgment, the District Court ruled for appellee, holding 202 (n) unconstitutional under the Due Process Clause of the Fifth Amendment in that it deprived appellee of an accrued property right. 169 F. Supp. 922. The Secretary prosecuted an appeal to this Court, and, subject to a jurisdictional question hereinafter discussed, we set the case down for plenary hearing. 360 U.S. 915 .
…We think that the District Court erred in holding that 202 (n) deprived appellee of an “accrued property right.” 169 F. Supp., at 934. Appellee’s right to Social Security benefits cannot properly be considered to have been of that order.
…The Social Security system may be accurately described as a form of social insurance, enacted pursuant to Congress’ power to “spend money in aid of the `general welfare,’” Helvering v. Davis, supra, at 640, whereby persons gainfully employed, and those who employ them, are taxed to permit the payment of benefits to the retired and disabled, and their dependents. Plainly the expectation is that many members of the present productive work force will in turn become beneficiaries rather than supporters of the program. But each worker’s benefits, though flowing from the contributions he made to the [363 U.S. 603, 610] national economy while actively employed, are not dependent on the degree to which he was called upon to support the system by taxation. It is apparent that the noncontractual interest of an employee covered by the Act cannot be soundly analogized to that of the holder of an annuity, whose right to benefits is bottomed on his contractual premium payments.
It is hardly profitable to engage in conceptualizations regarding “earned rights” and “gratuities.” Cf. Lynch v. United States, 292 U.S. 571, 576 -577. The “right” to Social Security benefits is in one sense “earned,” for the entire scheme rests on the legislative judgment that those who in their productive years were functioning members of the economy may justly call upon that economy, in their later years, for protection from “the rigors of the poor house as well as from the haunting fear that such a lot awaits them when journey’s end is near.” Helvering v. Davis, supra, at 641. But the practical effectuation of that judgment has of necessity called forth a highly complex and interrelated statutory structure. Integrated treatment of the manifold specific problems presented by the Social Security program demands more than a generalization. That program was designed to function into the indefinite future, and its specific provisions rest on predictions as to expected economic conditions which must inevitably prove less than wholly accurate, and on judgments and preferences as to the proper allocation of the Nation’s resources which evolving economic and social conditions will of necessity in some degree modify.
To engraft upon the Social Security system a concept of “accrued property rights” would deprive it of the flexibility and boldness in adjustment to ever-changing conditions which it demands. See Wollenberg, Vested Rights in Social-Security Benefits, 37 Ore. L. Rev. 299, 359. It was doubtless out of an awareness of the need for such flexibility that Congress included in the original Act, and [363 U.S. 603, 611] has since retained, a clause expressly reserving to it “[t]he right to alter, amend, or repeal any provision” of the Act. 1104, 49 Stat. 648, 42 U.S.C. 1304. That provision makes express what is implicit in the institutional needs of the program. See Analysis of the Social Security System, Hearings before a Subcommittee of the Committee on Ways and Means, House of Representatives, 83d Cong., 1st Sess., pp. 920-921. It was pursuant to that provision that 202 (n) was enacted.
We must conclude that a person covered by the Act has not such a right in benefit payments as would make every defeasance of “accrued” interests violative of the Due Process Clause of the Fifth Amendment.