So things like reimbursements are handled by a university trying to implement a state government's interpretation of both granting agencies desires and federal and state laws/regulations.
My university seems to be going crazy with rules lately. My hypothesis is that the state, and by extension the university, wants to button down everything so as not draw attention of the federal government (given who is in charge). It's taking already stressed professors (funding cuts, etc) and piling on more stress.
With the employees needing to use Concur directly, there's a tendency, since there's a diversity in how each employee will handle the specifics, to try to "save money" by denying reimbursements for any random violation, making sure all i's were dotted and t's crossed. The automated system itself encourages this because it's so low effort to deny and send the expense form back, potentially wearing down the employe that they just give up. Joanne could avoid all that at scale because there was little/no diversity in how expenses were handled. If an i needed to be dotted, she could handle it, and she knew all the i's that needed to be dotted across all expense reports.
I currently have someone to handle my expense reports who sits in front of Concur for me! And that person routinely asks me for specific detail without me having to mess with Concur at all, things like "who was at this dinner you gave me a receipt for" or "I can't find the receipt for this company card charge".
The shift toward an adversarial approach in just about any organization is noticeable, in fact, in the US in the last 10-15 years but the US hasn't grown in size that much, large scale organizations existed much earlier.