IMO consciousness is different from working memory, at least to a certain degree. The inner mind (working memory) is different from consciousness from sensory stimuli. You can stand outside and take in the environment and have a relatively quiet inner mind. When you think about math or philosophy a different type of conscious experience arises than sensory stimuli experience. That doesn't mean consciousness is completely isolated from working memory but there is some distinction there I can't describe fully.
Edit: I also think as someone else said, we already know the intermediate layers can contain a lot of adjacent words related to the topic without explicitly outputting those words. These could just be related embedding intermediate vectors that activate but aren't outputted.