Implicit in the activist conception of government is the assumption that you can take the good things in a complex system for granted, and just improve the things that are not so good. What is lacking in this conception is any sense that a society, an institution, or even a single human being, is an intricate system of fragile inter-relationships, whose complexities are little understood and easily destabilized.
The Congressional Budget Office has been embarrassed repeatedly by making projections based on the assumption that tax revenues and tax rates move in the same direction.
