The NHS Confederation in the UK has produced a fascinating report that looks at the available evidence about health system reorganisations and their impacts:
Although there is widespread acknowledgement of the problems of frequent reorganisation, there is still a tendency for it to be enthusiastically advocated as a solution - often with little reference to the problem it is trying to solve...In Australia, 1 January 2011 heralded the next round in the seemingly endless series of reforms and restructures. There's a lot we can learn from the report.
Even if there had been a more systematic evaluation, the number of changes in the last two decades means that many structures have had little time to settle down and produce results before being reorganised...
Poorly designed organisations and hasty change are likely to result in further restructuring.
Source: Edward N. (2011) The Triumph of Hope Over Experience, NHS Confederation: London.