Too many people are treating this technical problem like it's a political problem. Our communications infrastructure is vulnerable to eavesdropping; hence, eavesdropping occurs. That's not going to change unless the war you desire involves either destroying all communications networks or upgrading them.
It is a political problem. Technical solutions don't matter when the other side has an effectively unimited budget and manpower.
I strongly recommend watching PHK's recent talk talk on that subject in the link above. Avoiding politics by claiming this is a technical problem is simply forfeiting any goals you may have had to the opposition without a fight. Technical issues don't mean a damn thing against the bad end of rubber hose cryptanalysis or the old Soviet trick of simply "disappearing" people, and the aren't particularly useful against the current game of gag-order-filled "National Security Letters".
THAT SAID
It is also a technical problem. As you say, there will always be people interested in eavesdropping, and the tech needs to be fixed regardless. Maybe now we can finally get some progress on that front - I've taught more people about PubKey encryption and the Web Of Trust in the last year than the previous two "B.S."[1] decades. There's still a huge amount of work to do, unfortunately.
Both aspects - political and technical - are important, and we cannot afford to neglect either.
