We didn't look that far back in history, but we found that government departments were not keeping track of potential cost savings when moving from paper-based or other means of service to digital services. That seemed to be widespread.
We found, however, that Immigration, Refugees and Citizenship Canada had a rough estimate of moving to e-applications—electronic applications—for passports, and they found there would be savings of $1 to $5 per application. The savings seem low, but it's because it's only the application that will be digitized. For a good reason, there will still be heavy manual interventions in the processing and the issuance of passports, which is what one would expect from a country issuing passports.
There's not a lot of information tracking when it comes to e-services and digitization of services.