How long does the average project run for...?
How long is the average military posting (I know 4 yrs for procurement postings was suggested)...?
If a project lasts longer than the posting, then does human nature ensure that the person in post tries to minimise/obscure/hide any information on delays and overspend so that his/her report does not suffer, and it is the successor that eventually carries the can? Is it the fault of somebody incoming to a project if they pick up a poisoned chalice?
Having said all that - any thinning of Senior Officers can only be a good thing in my opinion!