I can't access it, but the stated rationale is that people for whom mass transit does not work for getting to their jobs, for whatever reason, would pay $3600 /year they could not afford. While the real reason is likely elections, do you have a thought on that cost?
The best estimate I’ve seen is that driving a car into downtown Manhattan imposes $100 of costs on the rest of society, in terms of congestion, slower deliveries, delayed ambulances, etc. So daily car commuters should really be paying $26,000.
Because it is a vanishingly small number of people. 1.5% of commuters to the affected zone drive to work. It is worth charging that relatively small number of drivers for their use of a limited public resource in order to improve transit quality, frequency, and accessibility for everyone else.