This is the Republican Party platform in 1936.
The unemployment insurance and old age annuity sections of the present Social Security Act are unworkable and deny benefits to about two-thirds of our adult population, including professional men and women and all those engaged in agriculture and domestic service, and the self employed while imposing heavy tax burdens upon all. The so-called reserve fund estimated at forty-seven billion dollars for old age insurance is no reserve at all, because the fund will contain nothing but the Government’s promise to pay, while the taxes collected in the guise of premiums will be wasted by the Government in reckless and extravagant political schemes.
Ok, so this is your standard ‘the trust fund is a Ponzi scheme’ style rhetoric. But check out the part I bolded. The Republicans are criticizing the new Social Security program for not going far enough. Originally Social Security did actually exclude whole categories of workers for complicated reasons mostly involving the South, but over the next 50 years or so, Social Security was improved to cover those excluded workers. The Republicans attacked the program from the left. They had, earlier in this 1936 platform, offered a broad-based pension style program for all American citizens over 65, and one of its virtues was it did cover workers excluded from Social Security.
The criticism was valid, but of course, disingenuous. Republicans never believed in Social Security, and the 1936 Republican campaign was organized around the theme that the New Deal was simply unconstitutional. Hence, here’s FDR mocking the Republicans for their criticism of Social Security from the left. Watch the video and see what an incredible politician and funny guy he was. Damn he was good.