Brad DeLong points us to a post from The Nation on early Koch brothers and Hayek The Road to Serfdom!!
Charles Koch to Friedrich Hayek: Use Social Security!: [I]n early June 1973, weeks after [Charles] Koch was appointed president of the Institute for Humane Studies. Along with his brothers, Koch inherited his father’s privately held oil company in 1967…. Koch invited Hayek to serve as the institute’s “distinguished senior scholar” in preparation for its first conference on Austrian economics, to be held in June 1974.
Hayek initially declined Koch’s offer. In a letter to IHS secretary Kenneth Templeton Jr., dated June 16, 1973, Hayek explains that he underwent gall bladder surgery in Austria earlier that year, which only heightened his fear of “the problems (and costs) of falling ill away from home.” (Thanks to waves of progressive reforms, postwar Austria had near universal healthcare and robust social insurance plans that Hayek would have been eligible for.)
IHS vice president George Pearson (who later became a top Koch Industries executive) responded three weeks later, conceding that it was all but impossible to arrange affordable private medical insurance for Hayek in the United States. However, thanks to research by Yale Brozen, a libertarian economist at the University of Chicago, Pearson happily reported that “social security was passed at the University of Chicago while you [Hayek] were there in 1951. You had an option of being in the program. If you so elected at that time, you may be entitled to coverage now.”
A few weeks later, the institute reported the good news: Professor Hayek had indeed opted into Social Security while he was teaching at Chicago…. He was eligible…. On August 10, 1973, Koch wrote a letter appealing to Hayek to accept a shorter stay at the IHS, hard-selling Hayek on Social Security’s retirement benefits, which Koch encouraged Hayek to draw on even outside America. He also assured Hayek that Medicare, which had been created in 1965 by the Social Security amendments as part of Lyndon Johnson’s Great Society programs, would cover his medical needs…. [T]aking on the unlikely role of Social Security Administration customer service rep, Koch adds, “In order to be eligible for medical coverage you must apply during the registration period which is anytime from January 1 to March 31. For your further information, I am enclosing a pamphlet on Social Security.”
(h/t Mike Kimel)