That’s an interesting suggestion. I wonder if it could legally be done? I don’t think the sisters themselves receive salaries. But lay people who have mortgages to pay, families to support, and debts to pay off, would have to be compensated somehow to get the equivalent of whatever they’re getting now: I don’t know how you could claim such a person is not an employee.
Maybe a multiple-charity system where part, per donor designation, goes to benefit the charity agents (trying not to say workers)?
I do know that some evangelical congregations take love offerings. Could something along those lines occur here.
Claim them as contractors, not employees.