I’m unclear on how $9 is not a fair price to drive a car from lower manhattan to new jersey. Public transit would cost at least that much.
But I am saying that not everyone that lives in the congestion zone are well off office workers, particularly those born and raised in lower Manhattan that have housing arrangements that go back a few decades. An extra $2-300 month in tolls is not nothing for many people. You can't easily bring hundreds of pounds of art and building supplies to your art warehouse in Newark every day on the path train.
It wouldn't be unfair if nobody were subsidized. It's unfair that just cars aren't anymore, but buses, etc. still are.