Welcome to Music Banter Forum! Make sure to register - it's free and very quick! You have to register before you can post and participate in our discussions with over 70,000 other registered members. After you create your free account, you will be able to customize many options, you will have the full access to over 1,100,000 posts.
'Working Man' feels more like Rush doing a Led Zeppelin impression to me. The structure feels more like a Led Zeppelin II outtake and the riff sounds like something Jimmy Page wrote, but Tony Iommi played... if that makes sense.
Early Rush were often compared to Led Zeppelin, problem was though they just weren't as good as Led Zeppelin and hence the move into their more familiar prog direction.