A clever economist could probably work it out so that's it's a pareto improvement for society. In other words those damaged by the policy could in principle be made whole from the gains of those who gain from it, with gains leftover.
It would also solve congestion, though.
yeah but the point is do we really want to reduce congestion by making poor people unable to afford transportation
The poor people take the buses anyway which finally now run on time
Parking is already controlled at "market rate." In San Francisco parking can easily run over $20/day. If you can afford $20/day just to park your vehicle, then you should be able to afford congestion pricing, or else find an alternative (which would hopefully get you in to the city faster since there's less congestion).
No one said it has to raise revenue. This whole process could be revenue neutral. Give direct cash injections to the bottom 20% to offset the cost. This is about incentives, not revenue.
Ya, that is indeed the question. Just pointing out that it would in fact work.