Socialized medicine is the keystone to the arch of the socialist state.
Notes from Wikiquote
Whitaker and Baxter published a fifteen-page pamphlet of questions and answers entitled The Voluntary Way is the American Way, which, deep in the Q&A, concocted a quotation from Lenin | Q: Would socialized medicine lead to socialization of other phases of American life? | A: Lenin thought so. He declared: socialized medicine is the keystone to the arch of the socialist state. | Senator Murray asked the Library of Congress to track down the quote and, as expected, they found nothing like it—most scholars assume Whitaker and Baxter dreamed it up.
Variants
form: "Socialized medicine is a keystone to the establishment of a socialist state."