('US') There are 100 people 'on staff'. [=working as members of the staff]
The department 'is staffed' with an equal number of men and women.
He has been 'on the staff' [=a member of the staff] for 25 years.
(..) That's tax-deductible. You can write that off. Yes, sir! Andy was a regular cottage industry. In fact, it got so busy at tax time, he was allowed a staff. Could you hand me a stack of s? Got me out of the wood shop a month out of the year, and that was fine by me. And still, he kept (..)1994 The Shawshank Redemption