Here's a refreshingly lighter piece on ethics in the WSJ. It suggests that while being frugal with your expense account may generally be a mark of virtue, it usually goes under-appreciated. It can even mark you as an oddball. It could be that colleagues and superiors feel resentful for what they see as their own lack of frugality exposed in contrast. It could also be that when taken too far, this virtue may become a kind of excessive-compulsive behavior.