It really doesn't. Spy agencies have been collecting economic and military intelligence on foreign countries and companies since their inception. It was a NSA apologist that correctly noted that each country with a spy agency makes it illegal for people to spy on them, complains about it internationally, and then funds an agency to spy on everyone else for their own benefit. Regardless of what laws or technicalities say, all these countries with spy agencies want foreign spying to happen & legally endorse it by creating said agencies. This should be expected.

Even if they made it illegal, I still wouldn't trust them as they'd try to do something to get an edge on negotiations. That something would be illegal activity they outsourced to mercenary organizations or partnered with nations with spy organizations with some benefit promised back to them. For example, nearly all of Europe has intelligence sharing agreements per Snowden leaks with the very agency (NSA) they're publicly griping about. Only 3 didn't in whatever deal that was: Switzerland, Iceland, and one other I can't remember.