Not condoning these officers' behaviour for one moment...but the rules on CEA must have been pretty crystal clear for them to have gotten prison time over it?!
I take it the JSP/whatever specifically states where you/your wife MUST live etc?
I remember the great Kandahar gravel fraud of 2011, where several senior Regiment officers walked away from the biggest MOD fraud case in history because it was hard to pin anything on them:
link to story