I think the OP's use of "justify" was perfectly fine. I think every purchase any of us makes beyond cheap necessities involves a cost-benefit analsys - whether conscious or otherwise. As DWFII eloquently pointed out, one's "benefit" can mean different things to different people or even can change for the same person as their own situation evolves. As for me, I suppose I can more easily talk myself into spending more on a "staple" for daily coat and tie wear than, e.g. a pair of bucks or spectators. On the other hand, I can easily imagine someone else choosing the shoe equivalent of buying an inexpensive daily driver for commuting to work and splurging on the red convertible for the weekends.