"Hayek's adversaries — Oskar Lange and company — argued that a market system had to be inferior to a centrally-planned system: at the very least, a centrally-planned economy could set up internal decision-making procedures that would mimic the market, and the central planners could also adjust things to increase social welfare and account for external effects in a way that a market system could never do. Hayek, in response, argued that the functionaries of a central-planning board could never succeed, because they could never create both the incentives and the flexibility for the people-on-the-spot to exercise what Scott calls metis. Today all economists — even those who are very hostile to Hayek's other arguments … agree that Hayek and company hit this particular nail squarely on the head. Looking back at the seventy-year trajectory of Communism, it seems very clear that Hayek (and Scott) are right: that its principal flaw is its attempt to concentrate knowledge, authority, and decision-making power at the center rather than pushing the power to act, the freedom to do so, and the incentive to act productively out to the periphery where the people-on-the-spot have the local knowledge to act effectively."