Ah that would be illegal. The NSA asks Australia to spy on Americans and report back and visa versa. Which is not against the spirit of the law at all /s.
While china's surveillance system is scary because it's in public, what might actually be more dangerous is the massive surveillance campaigns the US is carrying out. The US is more than happy to provide surveillance to all 5 eye countries.
What? No, not weird at all, the spying on Americans is in behalf of America, e.g. the NSA never gonna help with intel about how to attack America itself but they do so for enemy countries, or maybe just report about it for allies territories -in case allies stop being so in the near future-