If you pay attention to where they put these it's always in poor neighborhoods. You never see them in the rich neighborhoods because if they put them there well to do people have the time to lobby and get them removed or made illegal.
But rich people also don't like paying taxes. But they do like having services. So they find ways, like speeding cameras, to make sure that poor people pay through the nose so they don't have to.
It's the same way for the suburbs. Seriously Google it. The suburbs are completely unsustainable without the high population density inner City even though the inner cities are typically full of poor people. Middle class and well to do people leave the inner cities to poverty but they extract money from them. Because of the much higher population density they can get away with that.
It's going to be fun in a few years because we're gradually collapsing the entire economy and the suburbs are going to go with it. They cannot without subsidies afford their roads and police and fire departments and schools and whatnot. Even with the higher incomes they just don't have the population density for it.
And it's going to get real as the tax base collapses and we can't afford police anymore. You are already seeing some of the smaller towns and cities having to shut down their police and sheriffs because they're just isn't enough money and the smaller towns full of poor rural folk don't get to pick the pockets of the inner city the same way.