Thus, from a realistic standpoint, spying is sort of like doing market research for a startup. It allows you to make predictive decisions instead of reactive ones.
However domestic spying seems kind of silly. You should just be able to collect the information you need voluntarily through census and and surveys, without resorting to spying. If they refuse to provide the information, get a warrant.
As far as I am concerned, the two are not simply akin but deeply intertwined. Espionage can greatly improve the effectiveness of your military.
1. A system of government by the whole population or all the eligible members of a state, typically through elected representatives.
2. A state governed in such a way.
3. The cake is a lie.