I seem to remember something about the turnpike that it opened ahead of schedule and below budget, and was supposed to be paid off in the 1970s. Forty years after that plan expired it’s 10 billion dollars in debt and nearly everyone who works there or has worked there in the last forty years has a connection with a PA politician: nephew, mistress, idiot son of a donor, etc...
If you want the corruption to end in PA, at least one halfway noncorrupt political party has to be available to vote for.
IIRC, the same happened with the Garden State Parkway here in NJ; the tolls were supposed to be used to pay off the construction bonds, then they just became permanent.
Thankfully more and more tolls are automated; we’d reached a point where tolls were paying for little more than the toll collectors themselves. There is still another bureaucracy to administer the electronic tolls, though.