To be fair to the OP, they weren't really saying that they had nothing to do, more that they didn't feel like working. That doesn't make things better by any means, but suggesting that they find work to do doesn't actually answer the question, lol.
There are people who do not intend to make Target their career and are just working here to get some money and bide their time until they find something else. Many of them are just not invested in the job. Some don't last that long, but some can hang in there for quite a while, especially if they put on a good show when leadership is around. I'm trying not to sound too judgy, lol, because it's not always that they are bad people, they just aren't in the same mindset as others. We have TMs who have been at my store longer than I have that don't seem like balls of fire, IMO, but what can you do?