YOUR assertion.
Outsource everything business depends on then. Everything is a commodity, interchangable, right?
The price you pay is always on the spreadsheet, the number of employees used = productivity.
After all if outsourced employees 'save' you money by charging 1.75% instead of 2.25%, it must be just as effective, as flexible, and as aligned with your business goals as employees you hire yourself, given that salary levels are the same, and that an outsourcing company has additional overhead (additional management).
Right. Whatever.