I highly doubt so, but if so it should be the way to go because there are backdoors in nearly every piece of telecom gear because the providers are mandated to provide LEI capability by law.
If anything the if the US has a trust problems with the government then it should be a yes rather than a no.
But anywhere else in the world there is also little to no chance that the population at large would be up for denying the government the ability to have lawful intercept and lawful access to any protected resource during an investigation.
In fact you might not want to deny them that right at all because it would essentially shift the majority of the evidence to circumstantial eyewitness testimonies.
Because why stop at a phone call? why should a government be able to search your residence? open a safe? read a diary? open your computer?
And if you deny them all that then what happens? sure at first the legal system would be in a transition phase where much less people might be convicted because under these new restrictions the prosecution won't be able to meet the bar required for conviction but fairly quickly as soon as conviction rates would drop the legal system would bounce back up and get used to the reality of less evidence and this isn't a good place to be.
Any development in forensic sciences and investigatory techniques has prevented innocent people from being charged and convicted just as it helped to convict the guilty (don't get me wrong I'm not saying it's perfect or that mistakes are not being made, but DNA for example had to exonerate as many people that it helped to put in).
So I'm not entirely sure we want to go back to the days where people were judged in court based on how many character references they could provide.
>We allowed the government to open mail, open locks and tap phones with a warrant all of which were technically challenging.
If we had a referendum on this ("should the police be able to access the communications of someone as part of the investigation of a crime?") I bet "yes" would win. Myself I also think it's acceptable. Don't think it's so clear-cut.