I don't think L-J was saying that the requirement for admin role would cease, just questioning why it needs to be a high-churn, low-experience role for regular uniformed personnel.
The sheer amount of administrative support we now move into forward areas has been questioned repeatedly; especially as we seem to have a further army of admin staff back in the UK checking and questioning what is happening on deployed locations. Why do we not do it remotely? Heck, we have already shown that we can operate aircraft remotely!
Even if a small footprint is required in forward roles the use of reservists, FTRA, civil servants and contractors is already well exercised. I have deployed in very forward roles accompanied by individuals who are technically civil servants (albeit rather specialist ones). Meanwhile we have a uniformed scribbly and a uniformed PTI on the more comfortable side of the wire.
Edit: L-J beat me to it.