I looked it up. Turns out just about every R platform 1930-1980 was pro-union and pro-minimum wage protections. When healthcare became a thing, Rs always wanted private insurance as a part, but always supported public healthcare benefits in some instances. A sampling of TIL planks below:

R platform of 1936--Support the adoption of state laws and interstate compacts to abolish sweatshops and child labor, and to protect women and children with respect to maximum hours, minimum wages and working conditions. We believe that this can be done within the Constitution as it now stands.

1940--We shall maintain labor's right of free organization and collective bargaining. We pledge that our American citizens of Negro descent shall be given a square deal in the economic and political life of this nation. We favor the extension of necessary old age benefits on an ear-marked pay-as-you-go basis to the extent that the revenues raised for this purpose will permit. We favor the extension of the unemployment compensation provisions of the Social Security Act, wherever practicable, to those groups and classes not now included.

1944--The Republican Party accepts the purposes of the National Labor Relations Act, the Wage and Hour Act, the Social Security Act and all other Federal statutes designed to promote and protect the welfare of American working men and women, and we promise a fair and just administration of these laws.

1948--There must be decent living at decent wages. We favor equal pay for equal work regardless of sex.

1952--Still pro-union, pro-racial and gender equality, pro extending SS to all. First mention of healthcare: We are opposed to Federal compulsory health insurance with its crushing cost, wasteful inefficiency, bureaucratic dead weight, and debased standards of medical care. We shall support those health activities by government which stimulate the development of adequate hospital services without Federal interference in local administration. We favor support of scientific research. We pledge our continuous encouragement of improved methods of assuring health protection.

1956--Extend the protection of the Federal minimum wage laws to as many more workers as is possible and practicable; Continue to fight for the elimination of discrimination in employment because of race, creed, color, national origin, ancestry or sex; Provide assistance to improve the economic conditions of areas faced with persistent and substantial unemployment; Revise and improve the Taft-Hartley Act so as to protect more effectively the rights of labor unions, management, the individual worker, and the public. The protection of the right of workers to organize into unions and to bargain collectively is the firm and permanent policy of the Eisenhower Administration. Republican action created the Department of Health, Education and Welfare. We have fully resolved to continue our steady gains in man's unending struggle against disease and disability. We have supported the distribution of free vaccine to protect millions of children against dreaded polio. Republican leadership has enlarged Federal assistance for construction of hospitals, emphasizing low-cost care of chronic diseases and the special problems of older persons, and increased Federal aid for medical care of the needy. We have asked the largest increase in research funds ever sought in one year to intensify attacks on cancer, mental illness, heart disease and other dread diseases. We demand once again, despite the reluctance of the Democrat 84th Congress, Federal assistance to help build facilities to train more physicians and scientists.

1960--Relating wage and other payments in production to productivity—except when necessary to correct inequalities—in order to help us stay competitive at home and abroad. Spurring the economy by advancing the successful Eisenhower-Nixon program fostering new and small business, by continued active enforcement of the anti-trust laws, by protecting consumers and investors against the hazard and economic waste of fraudulent and criminal practices in the market place. Republican action has given to millions of American working men and women new or expanded protection and benefits, such as: Increased federal minimum wage; Development of a health program that will provide the aged needing it, on a sound fiscal basis and through a contributory system, protection against burdensome costs of health care. Such a program should: Provide the beneficiaries with the option of purchasing private health insurance;Include state participation; A single, federal assistance grant to each state for aid to needy persons rather than dividing such grants into specific categories.

1964--Start to sound a bit more like Rs, but advocate: full coverage of all medical and hospital costs for the needy elderly people, financed by general revenues through broader implementation of Federal-State plans, rather than the compulsory Democratic scheme covering only a small percentage of such costs, for everyone regardless of need; tax credits for those burdened by the expenses of college education; full implementation and faithful execution of the Civil Rights Act of 1964, and all other civil rights statutes, to assure equal rights and opportunities guaranteed by the Constitution to every citizen;

1968--Organized labor has contributed greatly to the economic strength of our country and the well-being of its members. The Republican Party vigorously endorses its key role in our national life. We support an equitable minimum wage for American workers—one providing fair wages without unduly increasing unemployment among those on the lowest rung of the economic ladder—and will improve the Fair Labor Standards Act, with its important protections for employees. The forty-hour week adopted 30 years ago needs re-examination to determine whether or not a shorter work week, without loss of wages, would produce more jobs, increase productivity and stabilize prices. While believing no American should be denied adequate medical treatment; (mostly private solutions, but do not question a public role)