Professor Caplan has solved another one of our problems, but everyone else is too ignorant to fix it. This gets to some of the problems with free market economists (who I agree with almost 100% of the time) trying to fix our problems. Ignoring the arrogance of the Professor’s assurances, the problems are as follows:
1) The state of VA has already taken tax money from people and used to pay for the roads. Do the roads then belong to VA, who can force people to pay for them again? Piling a “fair” tax on top of our unfair tax system, doesn’t necessarily make the tax system fairer.
2) The real problem is, more fundamentally, that tens of thousands of people need to get from VA into DC at the same time everyday. They all need to come over only a few bridges (or by subways, which are very crowded at that time, so it’s not clear to me how much more capacity they have or where people would park in VA to get on the subways). So, why not tax companies that start their work day at 9:00, or tax groups who have successfully opposed the building of more bridges over the river?
Further, these people have already paid for the roads. So, I agree that tolls would be great, if roads were privately owned – since they’re not the answer isn’t so clear.
[As an aside, I haven't read Professor Caplan's book yet. From the reviews I've read, it sounds like he's identified some interesting biases which ensure that "errors" in voting are not normally distributed about the "correct" choice. His solution, which seems to boil down to the creation of an economic aristocracy, sounds a bit creepy though.]