The fund may exist on paper, but the money doesn't exist.
Social Security is a tax to pay current welfare benefits, not a retirement plan.
See: FDR and "The New Deal" (briefly)
At Roosevelt's nationally broadcast inauguration speech, the new president denounced the "money changers" who had brought on the economic disaster and declared that the government must wage war on the Great Depression as it would against an armed foe.Roosevelt's liberal solution to the problems was to aggressively use government as a tool for creating a "new deal" for the American people, aimed at three R's--relief, recovery, and reform. The New Deal's most immediate goals were short-range relief and immediate recovery. These were the immediate goals of the Hundred Days Congress, which met March 9-June 6, 1933. Long-range goals of permanent recovery and the reform of institutional abuses and practices that had produced the Depression came as part of the Second New Deal, from November 1933 to 1939.
Real reform was enacted by passage of the Social Security Act of 1935, which provided a social safety net beneath FDR's New Deal economy. The new law provided for federal-state unemployment insurance, and a retirement pension for old-age workers, ranging from $10 to $85 a month, and paid for by a payroll tax of both employers and employees. Provision was also provided for the blind, the physically handicapped, fatherless children, and other dependents. Opposition to Social Security was bitter. Republicans falsely claimed that every worker would have to wear a metal tag for life in order to be identified by their Social Security number. Liberals were essentially copying the ideas of industrialized Europe. It was a recognition that in the industrialized economy, with its boom-or-bust cycles, the government must bear some responsibility for the welfare of its citizens....
(The New Deal. Authentichistory.com . 6/14/2012)
It was basically implemented FIRSTLY to
1. FREE jobs up in a HORRIBLE job market, by allowing older workers to retire, to make room for the burgeoning younger work force-
2. To suffice WAR widows and the families thereof.