In my own personal opinion, I think systems like this should be 'opt in' not opt out. It should be a personal choice, not Governments taking liberties that ignore democracy and privacy that so easily can be used as weapons not only here, but in dictatorships and countries that make an art form of internet theft, espionage, corporate abuse and interference in private lives.
For example, it would be so simple for companies such as insurance agencies to hack into something like 'My Health Record' and use it against their clients to deny them access to insurance or health claims.
Clearly, like anything else online, anything a computer literate human can do, another computer literate human can undo, history up to the present day demonstrates that.
I think that the answer is "we don't know". All anyone can do is hope that that is not the case and do the best they can with the scenario offered and hope it works.
It's runaway technology in any area, so there are serious limitations to protections no matter what as far as the internet is concerned. Some areas have been out of control for a long time and that is not likely to be remedied any time soon.
