For years NJ was able to pay for state government from royalties collected from its railroads. In exchange for royalties the railroads got exclusive rights to New Jersey.
Then one day the railroads sank into bankruptcy. Commuters from central NJ still talk about the day the Pennsylvania RR commuter trains did not arrive.
Fortunately New Jersey Transit came to the rescue.
Meanwhile, the NJ state tax structure changed dramatically. Property taxes had always paid for schools. But now state income tax and sales tax became necessary. Turnpikes are still a source of state revenue.