Generally speaking, a compulsive shopper will not stop when they have everything they need. It really has nothing to do with need.

They have more than enough clothes to wear, and they have enough objects within the house.

Shopping addicton is all about just purchasing and bringing about that affective experience.

So they could actually have two similar outfits or similar objects in the house, because it's not about the possession, the utility of the object or the clothing.

Shopping addiction is about going out and engaging in this activity to bring about a feeling state that is more desirous than the one that preceded it.