The point I was alluding to was simply that the fuel tax, levied in 1956 to finance construction of the Interstate Highway System, is no longer being applied to that purpose. Instead, that huge pot of money offers members of Congress a greater opportunity to claim to the folks back home that they've secured federal funding for such-and-such. As this article illustrates, even stalwart conservatives such as George Allen can't resist the temptation.
I say, starve the beast.
all too true. You wouldn't want taxes to actually benefit the people who PAID them would you?