I have ~no problem with gov on gov spying. I actually have more problem with China's spying on US companies for commercial reasons than China's spying on the USG. USG spying on private individuals might be worse than China spying on USG from an abstract moral perspective.

I'd argue that US v USSR spying during the Cold War, particularly PHOTOINT and SIGINT and other forms of technical intelligence, largely averted a global thermonuclear war. Gov v Gov spying is just another form of transparency. (obviously as a US citizen I'd prefer the US to have an edge there, but generally for something like Brazil v Argentina I don't particularly care)