If I'm reading this correctly... the local cops want the power to go after international crims. Really? Here in the States it's damn near impossible to get extradition from one state to another that's even if the locals take an interest in it. The usual response is "not our problem".
OTOH, the slippery slope applies. Once they have these powers, where are the checks and balances to prevent misuse? Will there be redress as part of the system? Who watches the freakin' watchers?
It boils down to "NO", just "NO". These things have a way of spreading from the UK to the US, et al, and vice versa but those promoting it either haven't studied history or don't give a crap about "what happens next?".