I have no sympathy with people who have behaved corruptly, particularly when they are supposed to be upholding the law. I believe they should face disciplinary proceedings and, if appropriate, be sacked. I don't believe they should have the option of avoiding by resigning.
However, if someone loses their job and is imprisoned for their crime, is it right that they also lose 40% of their pension? I realise that it is probably meant to act as a deterrent but it doesn't seem fair to me - does it happen to other professionals? Or am I missing something - is it the equivalent of them getting back the money they paid in but losing the benefit of the employer's contribution - and are these people explicitly warned that that percentage of their pension can be withheld should they be sacked?