Public / Private Partnership
I'd expect a number of "research organizations" will spring up to study surveillance tech. They'll need a lot of test data so will contract with local businesses (and public libraries, etc.) to share the data collected from devices "on loan". The Authorities will see an uptick in useful "anonymous tips", and the whole thing will be funded either by skimming a bit off the "Widows and Orphans Fund", or under some obscure title in the 500 page "Unicorn Preservation, Rainbow Appreciation, and Omnibus Funding Bill", passed at 4AM in an extraordinary session, after being introduced at 2AM.
Shortly thereafter, a number of people who look a bit too much like stock photos of terrorists may mysteriously disappear.