There are probably two things. One is funding, because resources are scarce. We were also told by senior government officials that even if there were unlimited funding provided, for example, it would be very difficult to find the qualified individuals who would be capable of establishing end-to-end digital services for citizens. Money is one driver but, more importantly, qualified staff is another.
Evidence of meeting #79 for Government Operations and Estimates in the 44th Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was services.
A recording is available from Parliament.