Long gone are the days when Cast Members would check out their costumes at the beginning of every shift, now you collect 5 of them and bring them home. It was originally sold as a way to save the company money by not paying the extra 20 minutes they'd pay you to change in/out of your costume. However, the net result was that it wound up in a lot of missing wardrobe pieces thanks to the high turnover rate.
Was a big downgrade in show quality, as you see Tower of Terror bellhops pumping gas and SWGE inhabitants at Publix.
Regardless, this change (which happened many years ago now) likely led to this here, so cast members can be utilized at multiple resorts, without having to get new costumes.