You would be surprised. On a day that I don't get to the gym, I average around 9000 and I spend most of my day working at a desk or moving between meetings (i.e. I don't consider myself very active).
I worked a physical job, stocking books and filling book orders for a summer while in college[1]. I used a pedometer and rarely went much above 10k steps (for the 8 hour shift anyway). That's walking basically for 8 hours straight (with stops to place or grab a book).
[1] - not my only physical job, but the one I walked the most, and the only one I ever had a pedometer on.
Despite how it might subjectively seem, its not anything even approximately like walking 8 hours straight if you don't get over 10k steps; a fairly average walking pace is ~80 steps per minute, for 8 hours that works out to 38,400 steps.