Centralized power has a problem: the individual. Every person is a potential disrupter of The Plan, and disruption must be forbidden. Otherwise, why have a central plan? This applies regardless of whether the planning is economy-wide or for particular sectors, such as medical services. (See F. A. Hayek’s The Road to Serfdom.)
Paine on War
"It may with reason be said, that in the manner the English nation is represented, it signifies not where this right resides, whether in the Crown, or in the Parliament. War is the common harvest of all those who participate in the division and expenditure of public...