Can we display ID when a user enters Requester or On Behalf Of?

When a requester is typed, in the drop down, the ID would be so incredibly more useful than the email address or department.  Can we replace the department and have it display the ID?

Once a user is selected, the ID is also not displayed, the title, department, email and contact number are displayed.  Again, the ID would be much more useful than most of this displayed information.  

The More Info button is probably more clicks than we will realistically get our users to do.