This is a very good question. The answer depends on how big your military is. Remember pop science adds a lot to nw/a for a few reasons 1. science adds networht just by its self. 2 it add people and people add to networth 3. the bigger population the more likely one is to make there military bigger. Bigger military mean more net worth. If one has a super big army one does not want to us science. I will use my province as an example I'm playing gnome this age. My MOD military is running at 99%. I have no science because if I did that would make my net/a too high. See it all depends on your strategy and what that strategy calls for to work correctly.