For example, Mike Hearn says: "Bypassing that system is illegal for a good reason." Illegal under whose law? Obvious things like the Wiretap Act simply don't apply outside the U.S. And this is by design: Congress and the courts are primarily domestic institutions. The executive, by design, has primacy when it comes to activities outside the U.S. Maybe this design made a lot more sense back in the day before the advent of trans-national corporations, but it's the design we have, and we're talking Constitutional-amendment level fixes to change that design.
Internally, you might see fixes without a Constitutional amendment. E.g. the Supreme Court might at some point weaken the third party doctrine, which is what makes a lot of the NSA's data collection not a violation of the 4th amendment. But they won't touch the activities of the NSA internationally.