These would be examples of normalization, not a slippery slope. The OP's example makes this clear (from "congestion pricing in NYC" to "they're going to take my car," not "congestion pricing in NYC" to "congestion pricing elsewhere").
(Regardless, I think the answer is simple: congestion pricing is only economically viable when an area is simultaneously congested and has alternative transportation methods that would prevent the local economy from collapsing. NYC is one of a very small handful of cities in the US where this is true, although that's largely a function of 80 years of car-centric design. Maybe it will change.)
(Regardless, I think the answer is simple: congestion pricing is only economically viable when an area is simultaneously congested and has alternative transportation methods that would prevent the local economy from collapsing. NYC is one of a very small handful of cities in the US where this is true, although that's largely a function of 80 years of car-centric design. Maybe it will change.)