Ladies are so much in this business of getting things they may never get to use. Impulsive buying. A woman may get a pair of shoes because her friend(s) got it too. She may however dislike it after buying. As much as it seems it is ladies that are most guilty of these accumulation of junks, some men are also guilty. Sometimes, we just get thingsore than we need and we eventually waste it because we've gathered a lot of it.

Women are responsible for 70-80% of all retail shopping expenditure. It's really a problem of women's making for the most part. If your wife is both rational about this and thrifty, it's like dodging a bullet. Too much stuff in the household is antithetical to peace of mind by the very mechanisms outlined by @kaylinart: money, time, and space.