Maggie's Farm

The Law says that there always are some of those. People in business analyze them carefully, as do war-planners - in advance. Even so, many or most things do not work out as planned. When it comes to politicians and policy-makers, often-enough things that appear, in retrospect, as Unintended, were covertly intended.

From Overreaction syndrome:

 Today’s political process tends to steer people away from thinking carefully about the many trade-offs in deciding public policy issues. This leads to a cycle of overreaction in which policymaking focuses on minimizing error in one direction, leading to worse errors in the opposite direction.