Given that scammers could literally be anywhere in the world, I'm not sure what the UK government could do about it save impose some kind of China-like restrictions on UK users only being allowed to see other UK users, and that ain't going to happen. And currently there are an estimated 3.5 billion registered FB accounts, with about 2.9 billion active globally, so weeding out fake / scam / phising accounts is not going to be easy. We can report them as we see them, but keep in mind its highly likely that the scammers are reporting legitimate accounts to slow checking down, so responses may take a lot of time. I know they do take them down as I've reported some myself which eventually get dealt with, but again its just possible that for every one dodgy account that goes down two more go up.
These scammers aren't kids sitting in basements, they are often entire companies with hundreds of employees operating out of countries around the globe. Many may even be "friendly" to local authorities, meaning that even if international pressure is applied on the home governments little to nothing will be done. So it is up to those of us aware of what to look for to ensure that we help protect those that don't, even if its just an offer to family and friends to shout out if they are not sure about a "too good to be true" offer they stumble across.
There are a lot of scammers on the Internet now. It's hard to find them, you block one, two appear. A person who catches such people told me a lot. Now I am very vigilant. I do not pick up the phone from an unknown number, do not answer strange SMS, always check resources. Recently a friend wrote to me and offered to get a casino bonus on
https://gamblizard.com/ and what do you think? I immediately called him and asked "did he write me this SMS"?! It turned out that he really wrote, it may seem like paranoia, but these are just precautions.