You don't fix these problems with people in various positions of power, by handing them more power. The GCHQ have a long history of infiltrating trade unions and protest groups; I very much doubt their motives.
Very high profile "untouchable" pedophiles have been and probably are still operating right in front of the police and they have not done anything out of choice or mandate through whichever political or societal connection that they have.
If they can't do anything about those people then why should they be granted extraordinary powers?
Former US government attorney Alexander Acosta also said he "was told Epstein 'belonged to intelligence'""
https://twitter.com/benjaminnorton/status/127874391952690790...
But perhaps I'm underestimating the stupidity of criminals - perhaps they'd just stick to unencrypted communication. However, if the usage of Tor for illicit activities is any hint, I'd say that is unlikely.
Social services having the resources to actually to their jobs?
Blaming it on <immigrants> is really quite a stretch. I've never heard of a refugee with a private island flying other refugees there to do drugs and kids, but I don't always get all of the news so I'm willing to be proven wrong here.