paulj wrote:
Tolls and gas taxes aren't exactly fungible.
That would be true if state and federal governments were responsible, but they're not. The truth is that everything gets dumped in one big pot. Revenues from so-called "use taxes," such as vehicle registration fees and in some contexts, sales tax, are not strictly allocated for any particular purpose.
A great example would be toll bridges. The original justification for charging tolls was to pay for the cost of constructing them. But decades after tolls repaid that cost, the tolls still exist--and are far higher than when the bridges were built.
It's like feeding the bears at the dumpster in the park. They come back, expecting more.
And as far as National Park entrance fees are concerned--yes, they're tolls, but they're also use fees. The two components could be separated out by seeing how much the parks charge for entry on foot or bicycle.