I thought the idea was that diplomacy points and administrative (presumably tech, or maybe at least some tech) would use different "power"?
So eg. diplomacy skill generates diplomacy points, adm. generates adm points and mil generates mil points.
I would presume this is the case, but we don't have much to go off. I don't know if technology in particular would fit into the ADM model well; there are certainly many administrative and military technologies, but not much for diplomacy. So, we don't know how technological growth really relies on the various monarch points, but I would imagine that different techs use different types of points (possibly multiple types; a new type of army organization might use both admin and military, for example).
My point is this: If you spend your admin points on, say building a new port facility, it shouldn't be a zero sum game in terms of depriving you of resources to advance your technological capabilities. You'd think a nation with many well developed ports would be *more* advanced than one that decides not to build up their cities.