Exactly. You don't implement your Baghdad style checkpoints in Manhattan. You do it in the Bronx. The rich (the people who's non-disapproval you need) get told by the official statements (that the newspaper regurgitates) how it's the best thing since sliced bread while not actually being negatively affected by it themselves. The fact that you've got a bunch of rich people who never see the downside of each step toward the police state and don't come out strongly against it lends legitimacy to each step.
Your assumption is that the government is not controlled by the very wealthy already, so that their disapproval of the very thing they are engineering is possible. It's not designed to target them. It's for their benefit. There's no downside for the wealthy with this tech, it's all upside since it gives them greater control.
Controlled is an odd word in this context. It's both controlled by them and seeking to diminish their capacity to resist it at the same time. I think there's some tragedy of the commons here since you've got many people advocating for more government control in specific cases and it adds up to a police state.
>There's no downside for the wealthy with this tech,
Wealthy people break petty laws (the kind of stuff these systems make it possible to crack down on) all the time. There's a reason you never see the cops running a DUI dragnet at the rich people boat ramp. The wealthy do not want to be subject to surveillance dragnets because while many people can pull strings to get out of trouble very, very, very few people can afford to pull string with the regularity that would be required if the rich were subject to a police state.