Having adequate law enforcement training and funding, is not mutually exclusive with leveraging technology for more effective enforcement. In fact that's where some of the funding goes. I would be interested in seeing some data reflecting a reduction in crime as a result of increasing the welfare system, as you claim.
I mean compared to corporate written Wikipedia articles from privacy invading dystopian nightmare companies the evidence that welfare reduces crime is so obvious that even a quick google search drowns one in 3rd party validate studies:
But again, by the time we did all the non privacy invading stuff that doesn't target me as a law abiding citizen the discussion about these devices becomes moot because crime isn't that much of a problem anymore.
https://en.wikipedia.org/wiki/Flock_Safety#Efficacy