> the US can't legally spy on it's citizens, but it could absolutely sell the same spy software to Australia and let Australia spy on our citizens, and then broker the data back and forth.
I thought that it was well known that, in fact, this was happening
https://en.wikipedia.org/wiki/Five_Eyes
One of the core principles is that members do not spy on other governments in the alliance. U.S. Director of National Intelligence, Admiral Dennis C. Blair, said in 2013: "We do not spy on each other. We just ask."[87]
In recent years, documents of the FVEY have shown that they are intentionally spying on one another's citizens and sharing the collected information with each other. Although the FVEYs countries claim that all intelligence sharing was done legally and followed the domestic law of each nation. [11][12][13][14][88] Shami Chakrabarti, the director of the advocacy group Liberty, claimed that the FVEY alliance increases the ability of member states to "subcontract their dirty work" to each other.[89] The former NSA contractor Edward Snowden described the FVEY as a "supra-national intelligence organisation that doesn't answer to the laws of its own countries". While many claims of illegal intelligence sharing among FVEY nations have been made, only once has any FVEY intelligence agency been shown to have broken the law with intelligence sharing in Canada.[10]