Considering governments have about the same capacity to store data securely as a twelve-year-old, those decryption keys basically open up the door for everyone who is willing to put the effort into retrieving them.
And considering the retrieval would certainly be breaking at least a few laws, the people who are going to pull it off are going to be
- nation states
- APTs
- large criminal organizations
- large corporations (corporate espionage)
So you arguably defeat the entire purpose of having encrypted data streams. Sure, the barrier of going and "stealing the keys" is still there, but given the track record large governments have at not leaking data, it is safe to say there would be little barrier aside from legal ramifications if caught.
And considering the retrieval would certainly be breaking at least a few laws, the people who are going to pull it off are going to be
- nation states
- APTs
- large criminal organizations
- large corporations (corporate espionage)
So you arguably defeat the entire purpose of having encrypted data streams. Sure, the barrier of going and "stealing the keys" is still there, but given the track record large governments have at not leaking data, it is safe to say there would be little barrier aside from legal ramifications if caught.