What mutual backscratching? No such program was in the Snowden leaks. If you're claiming that the US gets other countries to spy on its citizens, that would be utterly illegal.
Essentially what they’ve done is commit treason by colluding with hostile foreign powers to mutually spy on each others citizens, bypassing the pesky constitutional/charter limitations in the process.
In the right political climate we could Nuremberg trial 5 levels deep into the organizations responsible, I’m hopeful for that outcome.
Reminder: “I was just following orders/policy” wasn’t a defense then and it won’t be this time either.
If they are doing it, where's your evidence? You don't have it because otherwise, Klayman would have filed a lawsuit.