In the U.S., military espionage is heroic and economic espionage is a crime. In China, the line is not that clear.
Let me say this: BULLSHIT, a thousand times.Who says this? Any of the companies who have been lying to their customers? Any of the government agencies which have not explained anything about the NSA activities (not that they would know what is going on)? Any of the officials caught lying, one and again?
The US will not perform economic espionage as long as the US has a technological edge (which is probably not anymore the case in lots of areas).
Which brings us to an important observation: OCDE rules forbidding economic espionage are designed to keep the current technological status quo; any country is well advised to sign them to be accepted to the club, and immediately throw the rules to the garbage bin. Because we can be sure that any country capable of doing economic espionage has been doing it, is doing it, and will continue to do it, no matter the rules, no matter if they get caught, no matter the hypocrital public posturing of their leaders.
Those rules, and the whole "Intellectual Property" apparatus, is there for the suckers to respect them. The US, in particular, has never respected those rules.