One last thing I almost forgot: yes, that WOULD be a damn good idea,

wouldn't it?
It's a fundamental misunderstanding of the problem. Why do you think Apple and Google are doing this? It's because the public is demanding it. People like me: privacy advocates. A public does not want an out-of-control surveillance state. It is the public that is asking for this. Apple and Google didn't do this because they thought they would make less money. This is a private sector response to government overreach.

Then you make another statement that somehow these companies are not credible because they collect private data. Here's the difference: Apple and Google don't have coercive power. District attorneys do, the FBI does, the NSA does, and to me it's very simple to draw a privacy balance when it comes to law enforcement and privacy: just follow the damn Constitution.
Y'know, the Constitution?  Something in your oath about upholding it, not trying to trash it at every opportunity, you bastards?