Purchasing officer
When I was responsible for the IT in the teaching service I helped to manage we were forbidden from buying stuff ourselves. It had to be sourced from the council's IT buyer, who added his costs on. But then he ordered everything from a well known supplier's catalogue that we had in the office, and which was never the cheapest supplier.
Did we get a special price for being part of such a large organisation? No.
Could he advise us about the TCO of various devices? No.
Did stuff come really quickly and with brilliant after sales service?
Still no.
What was the point of this?
Well, i think just that we weren't trusted to buy kit that we needed to use, paid for out of our own budget. I assume thiis was in case we were buying it for some dishonerable purpose.