The willingness to do work "beneath you" is a fundamental requirement for any founder really in my opinion. Besides the trivial advantages (tedious minor things get done too) it sets an example for the employees.

When I was studying mechanical engineering, I was doing a summer internship in a medium sized industrial plant in southern France. Every now and then, the owner of the company got into a forklift and did warehouse duties himself, just like his workers. This is a very old trick in the book.