The surveillance protects the regime, which mostly involves the US Federal government. Street crime, unless it’s organized by Cartels, is not a political threat.

You can see the counter example during the 40s-70s when the FBI targeted the mafia and local political corruption to take out the remaining organized crime strongholds .

Today organized crime doesn’t have much political influence. A sort of truce. So there’s no longer incentive for the feds to pursue street crime. Street crime yields no longer funnel into influence.

In fact, most political corruption today is coming from entitlements , which further bolsters political control.