"Suppose the next election is Hillary vs. Christie. Would you be happy with people listening in on Christie's phone calls and those of his circle and supporters? Or Hillary's?"
This is exactly what is happening in Turkey.
Consider the very well reported "Kuchmagate" incident in Ukraine in 2000 in which a government spy, spying on President Kuchma (aka "his boss"), revealed that Kuchma was involved in criminal activities including kidnap/murder. It resulted in a dramatic political change in Ukraine. The intial release of the recordings was completely anonymous.
We may like the change, considering it a baddie getting his just desserts, but this is a troubling precedent. Anybody could choose to do this for any political or personal reason.
And then there is the "Squidgygate" where private (but embarrassing) conversations involving Diana, Princess of Wales, then the wife of the heir to the throne, were apparently recorded by a phone tap on New Years Eve 1989, then rebroadcast several days later by the tapper so that it could be clearly picked up by anyone who monitored non-commercial radio frequencies. The apparent conclusion would be that that agents of the British Government spied on Diana to aid Prince Charles in dealing with his troubled marriage, headed for divorce.
The rise of the national security state has placed all democratic institutions in peril.