All the massive five-eyes apparatus does you no good if the people supposed to act on that intelligence are corrupted, and look to their own interests first:

https://www.jonathanpollard.org/1998/040798b.htm

https://www.amazon.com/Deception-Clinton-America-Chinese-Mil...

https://www.businessinsider.de/china-acquiring-military-secr...

https://nypost.com/2019/05/11/the-troubling-reason-why-biden...