re: Why do you have(traditionally) to give a two weeks notice, but your company can

One of my former employers had a policy that once you submitted a 2 weeks notice, they told you to pack up your office and be gone that day.

Knowing this, when I resigned I didn't formerly submit a 2 weeks notice. I just said that today would be my last day. Bc I did this, they didn't pay me for the 2 weeks that I would have been gone... Stupid on my part.