Independent Contractor Insurance query

Hi Scott,
A build on your news item regarding Rusev's pledge to support WWE production staff.

Who else in WWE is a long-term Independent Contractor? Any refs. announcers. or trainers that WWE is afraid of losing to other orgs?  Or is it just about the in ring talent?  
I believe everyone who is not a wrestler is classified as an employee.  The refs MIGHT be contractors because they travel around too, but I don't believe so.