Here in Seattle the traffic cameras are not used to limit speed, but to monitor intersections for red-light violations. The glue-squirting fellow in my anecdote objected to the fact that the for-profit corporation which builds and operates these cameras gets a cut of the revenue from the citations they issue. He felt that it was one thing to enforce the law, and quite another thing to run a profitable business doing it.
That makes more sense. Traffic accidents should not be a profit center, and placing cameras where it makes the most money is unlikely to align with places where it has the biggest impact on reducing fatal accidents. The Vision Zero goal that Sweden has is often cited as a guiding rule for designing the road system, including the use of measures like road bumps and traffic cameras. Giving money from the fines to a for-profit corporation seems fairly obvious that it will create perverse incentives.
