The tendency to try to control what we call lawful access in Five Eyes countries goes back 10 or 15 years. Australia's and the United Kingdom's laws are particularly robust when it comes to collecting data for the stated purpose of combatting pedocriminality, going after criminals and such.
To date, however, there is no evidence that crime decreases when law enforcement has greater access and more say over the level of encryption of applications, messaging platforms and other tools. Those broader powers have not been shown to lead to a decrease. At the end of the day, more information is being collected, but crime isn't going down. That's all this is doing.
What we actually see with the broadening of powers is that criminals tend to go dark. They use other methods, other tools, and the trail ends up going cold anyway. Nevertheless, more and more data are being collected on ordinary people—people who aren't involved in these activities.