The need to be seen to be doing something will always outweigh the common sense of enforcing good policy that someone else came up with.
Totally right. There has been a massive shift from policy makers and management to justify their own positions to change things for change sake and to be seen to be doing something, whether its effectual or not.
The opinion of people doing the work that is effected by these changes are rarely taken on board to any extent during the restructuring process. What happens is that you have a reasonably well functioning team or department which is broken down or amalgamated with other departments usually at the cost of jobs.
The thing that annoys me is that the middle management and above seem fairly immune to these purges and their own positions and performance is rarely evaluated and they never face"restructuring".