You never know who you will work for or who will work for you. Today I had lunch with my first employee from ten years ago. He came with one of my customers who now works at my former employee's office after losing his job in January.
 Confused? I understand.
It reminds me of one of my staff who used to be my boss in 2001.
Who knows if I will work for one of my staff years from now?
It's best not to burn any bridges to possible employers of the future.