“you cannot control crime through the criminal justice system.”
This is a self-defeating attitude to take. Looking again at that quote "for every 100 crimes committed only 50 are reported to police, even fewer of those reports are recorded and a mere two per cent of crimes are successfully prosecuted."
A serial offender may only be successfully prosecuted for those crimes where he leaves sufficient evidence to support a prosecution. In practical terms the police are justified in concentrating effort on those crimes so a 2% successful prosecution rate may, in effect, be clearing up rather more than 2% of crimes. However to ensure that potentially prosecutable crimes get the attention they deserve there needs to be some form of triage for all reports. The fact that not all reports are recorded is a worry and there probably needs to be a serious review to remove as much administrative burden on reporting as possible so that resources are freed up to triage and then investigate.
For physical crime extending triage would probably require more SOCO resources. For cyber-crime possibly this could be automated which I presume the new national unit is doing but I'd guess there are a lot of police counters who don't know what to do if someone does report such a crime. That needs to be attended to with 100% forwarding of reports.
As to prevention perhaps the biggest step would be re-engineering of email. At one level ransomware is delivered by email and at higher levels social engineering via email seems to be a way in for bigger frauds. Sender authentication needs to be baked into the system so that faked email doesn't get moved through the system. However, given that the PGP underpinnings for digital signing also provide a basis for universal encryption, I can't see TPTB encouraging the uptake of this any time soon.