Corporations and big organizations don't think like regular people. Yes you can repair the computers saving money, but now there would be no support from the OEM, and they would have at least two different systems - the repaired ones and the working ones, because I don't think that motherboards for custom office PCs they have (like HP or DELL PCs) are off the shelf. I have an old compaq PC I upcycled as a home server, everything inside is built to fit together and be very reliable, it is nowhere close a typical PC build. The motherboard isn't even square.