so they don't have to pay money to have actual police officers doing proper work
Nope. You're falling into the trap. It's not about stopping crime. It's about stopping thoughtcrime. As pointed out in the article, actual criminals are already using (probably multiple layers of) encryption that won't be affected by this hypothetical backdoor: If JIANUSCUK get what they want, it will have near-zero utility for its (publicly) stated purpose. And they know it. They're lying - the actual purpose is that they want more mass surveillance. Pure and simple. That's pretty much all this would achieve (well, apart from making everyone less secure).
To engage in discussion about how backdooring encryption will help stop crime is to fall into the trap and believe their bullshit framing story. It won't help stop crime. It's not a cheaper, easier alternative to real police work. All it will do is help stop thoughtcrime.