No, but I could get them for minimum wages and no insurance and they would return the same amount. Hence, they don't pay for their health care out of foregone income. I pay for it in extra money I don't have to pay via premiums.
And it's hard to determine what a file clerk "returns.". Literally, only attorneys can generate income in a primarily contingent fee practice. We just hire enough folks around us to comfortably do all the necessary support work with a fair bit ofroom to spare so more valuable non-lawyer employees can get four extra days off per month when we arent in trial. Assigning individual "returns" to essentially fungible empolyees is a fool's errand in that sort of environment.