Ross Douthat recently had a column about "elite failure," which began by discussing Paul Ehrlich and his warnings about overpopulation. This is a strange example, because Ehrlich had no discernible effect on American policy. According to Wikipedia, he* recommended "a tax scheme in which additional children would add to a family's tax burden ... as well as luxury taxes on childcare goods ... incentives for men who agree to permanent sterilization before they have two children ... a powerful Department of Population and Environment which 'should be set up with the power to take whatever steps are necessary to establish a reasonable population size in the United States and to put an end to the steady deterioration of our environment.' The department should support research into population control, such as better contraceptives, mass sterilizing agents, and prenatal sex discernment (because families often continue to have children until a male is born). ... Legislation should be enacted guaranteeing the right to an abortion, and sex education should be expanded." Abortion laws were loosened and sex education was expanded, but none of the other policies were adopted or even seriously considered. Ehrlich also recommended that foreign aid should be given only to countries "with sufficient programs in place to limit population growth." That also didn't happen.
Douthat gives several more examples of elite failure, and they don't hold up either. One is "left-wing politics in the Covid era, when bad ideas emanated from academia and were laundered through other credentialed institutions." The major bad policy supported by the left was delay in returning to in-person schooling, but that wasn't particularly an "elite" idea--it was broadly popular. And the largest policy failure was on the right: resistance to the vaccine, which didn't come from academia. The next is DOGE, which he acknowledges "partly reflect[s] a populist unwillingness to listen to credentialed experts about the sheer difficulty of budget cutting. But the belief that a group of high-I.Q. outsiders can come in and remake a complex system is itself a characteristic elite temptation." However, DOGE wasn't an effort to remake the government--the idea was that there was a lot of obvious waste, fraud, and abuse. Finally, the war with Iran: "the voices in Trump’s coalition who were supportive ... included members of the pre-Trump G.O.P. elite and think-tankers who had been making the case for intervention for years. The voices raised in opposition often belonged to the populist wing, including some of its most paranoid factions. " Although some Republican elites have called for a harder line with Iran, those elites haven't had much influence on the actual policy. A few weeks after Trump's inauguration, I wrote that there was an approach to international affairs that was popular among the general public, but not among elites: "impatient with diplomacy, international agreements, and long-term obligations: we should intervene when the nation's interests are at stake and then get out." That's been Trump's approach to the war, and the results show why it's not popular among elites.
Douthat's model seems to be that academic and intellectual elites come up with ideas and those ideas trickle down to political decision-makers and the educated middle classes. Since academics and intellectuals lean to the left, that means that elites, even conservative elites, are influenced by the left. For example, Douthat's description of the "elite temptation" to remake complex systems is similar to the Hayek/Schumpeter/von Mises account of why intellectuals are attracted to socialism.
There are two problems with this model. One is that the spread of ideas often isn't a process of trickling down. Ehrlich was an elite academic (a professor at Stanford), but he wasn't an expert in human populations--his research was on insects. But (again according to Wikipedia) his public writing and speaking on overpopulation attracted the attention of the executive director of the Sierra Club and the publisher of Ballantine Books. Ehrlich also became a frequent guest on the Tonight Show. I don't know how he got his initial invitation, but presumably he was invited back because he was good on TV. That is, even in the days of media "gatekeepers," the process of getting public attention was entrepreneurial. Although sometimes entrepreneurs create demand for something new, often they fill a demand that is already there. A second problem with the model is that policymaking elites have some distinctive views that set them apart from all parts of the general public. Some of these are the result of the influence of experts--people who have specialized in studying an issue. With population, the specialists had noticed that economic growth and modernization were generally followed by declines in fertility. There's no information on elite opinions at the time, but my guess is that they were less concerned about overpopulation than the general public because they were aware of this pattern, so they continued to treat economic development as the priority.
Of course, this doesn't mean that elite ideas always right, or even usually right--getting things right is hard. But general claims of "elite failure," at least those that I've seen, are unconvincing.
*Apparently The Population Bomb was co-written with Anne Ehrlich, but Paul was listed as the sole author.