I've just been in a briefing in MB where a high-ranking civil servant complained that service personnel in her department were leaving as quickly as they could after arriving. It was pointed out to her that if you slash the allowances specifically designed to compensate military personnel for the extra cost (financial and emotional) of being separated from their loved ones and living in town, operational needs aside, that is exactly what you are going to get.
Recruiting and Retention Allowance (London) - it does exactly what it says on the tin!
Bear