I'm not a technologist, although now I'm gaining a bit more knowledge about technology after being in this position for a few years, but I think we're back to an incremental approach. The systems will be interoperable not overnight but gradually. Technology is a means. I would start with what government wants to do and what the impediments are to efficient services. Then I would determine what the required technology is to get you to the proper place.
On January 31st, 2019. See this statement in context.