Once, in another place, I had pointed out the misunderstandings of the common interpretation of Hayek’s road to serfdom thesis. This was not an unintended process by which government intervention on markets inevitably leads to further and increasing interventions. That might be Ludwig v. Mises’ thesis, but not Hayek’s.
What Hayek stated in The Road to Serfdom was that the checks- and-balances system of modern constitutionalism appears as an obstacle to the quick achievement of the concrete ends that an interventionist policy aims for. Thus, the road to serfdom is an unintended process by which legal constitutional processes are eroded by decisions based on expediency.
On that occasion it was left pending to solve the question of where the confusion on the central thesis of “The Road to Serfdom” came from.
The source of the answer to this question is yet Ludwig v. Mises. The Road to Serfdom was first published in 1944, but, previously, in essays published in 1935, we find Hayek, still heavily influenced by L. v. Mises, stating opinions that are very similar to the common confusion about the meaning of the road to serfdom: “In fact, however, if by planning is meant the actual direction of productive activity by authoritative prescription to be used, or the prices to be fixed, it can be easily shown, not that such a thing is impossible, but that any isolated measure of this sort will cause reactions which will defeat its own end, and that any attempt to act consistently will necessitate further and further measures of control until all economic activity is brought under one central authority” (“Socialist Calculation I: The Nature and History of the Problem”, first published in Collectivist Economic Planning, London, 1935, and reprinted in Individualism and Economic Order, Chicago, 1948).
F. A. Hayek did not change his opinions of 1935 in The Road to Serfdom (1944), he just shifted the realm of his inquiry from economics to political philosophy. Nevertheless, it would be a crass error to judge Hayek’s political and legal theory -for good or for bad- using his former opinions as an economist.