Maybe not literally all but certainly most. We hardly have any farmers or factory workers compared to what we had at one point. They've mostly moved onto cushy office jobs.
Most is 12%? This is the problem with HN. You're all so bubbled it's ridiculous to think sometimes a HN'er will say something like "If I were President."
You're using officer/administrator role for your number. The number of people who work in an office or sitting at a desk is much higher. I see numbers ranging from 40-60% for that.