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by saosebastiao 2705 days ago
Yes, you can make that argument against any public service. And it is worth discussing for any public service. All public services have benefits, and all of them are capable of being overprovisioned.

In the context of schools, literally everybody benefits from population wide literacy and education. The benefits are diffuse enough that it is worth subsidizing...although we're probably hitting diminishing returns on the amount that we do spend. And the idea that we need to learn russian if we don't have a military 10x bigger than the rest of the world is a cold war rhetorical relic. Of course we could do with less military funding.

Cars though, are mostly a benefit to the occupant, and either a detriment to everybody around them, or entirely capable of being priced into the benefit of the goods they buy. Yes, I can afford paying $0.0025 more for a pound of apples if it means the trucking company pays their true costs. And why should we subsidize your drive in a BMW to your office when you can easily pay for the whole cost yourself, or take transit? Why should we be subsidizing cars over the much more efficient alternatives?

Cars and transit are competing forms of transportation...a vehicle mile not traveled is very often a fare paid. Car costs scale linearly with the number of people-miles driven, until congestion and space constraints hit and then costs scale exponentially. Transit costs are step fixed costs, and therefore the more riders the less they cost per person. When we subsidize car travel, it forces us to subsidize transit travel even more, because taking away riders makes transit less efficient. It should be remembered that before we started price capping transit companies and subsidizing roads, transit was one of the most profitable industries in the world. That's the power of the cost efficiency of transit.

So yes, mobility is important and roads shouldn't just go away, but the amount of roads and car infrastructure that we fund through general taxes is absolutely obscene and should be scaled back dramatically. Mobility can be much more efficiently provisioned to the public with transit.

2 comments

> In the context of schools, literally everybody benefits from population wide literacy and education.

Education is more of a private good than you seem to realize. It is definitely excludable and in traditional settings it is quickly becomes rival past small groups of similarly motivated people.

Self learning is not rival, i.e. my learning of something does not prevent you from being able to learn it, but then that cannot be used to justify government provision of education.

Once one learns something, it becomes part of one's human capital and one cannot be separated from it. Hence the difference between loans for college versus mortgages.

Now, in this case, people are finding out that roads are not very public goods either (even though government entities have take over provision). First, roads are excludable. Second, they tend to also be very rival when they are most needed. The reduction in capacity highlighted their nature of quickly becoming rival.

Finally, if it people actually benefited from all the time-shifting, taking ferries instead of driving, leaving home at 5 am and sleeping in the parking lot waiting for the office to open, they all had that option before the construction began. Ergo, people are made worse off by the change no matter how they are adapting.

In a society where most of the people are barely able to read, an advanced degree isn't worth that much compared to a highly industrialized society.
Why are most people barely able to read in such a society? Do you think if there is net return to being literate, people would not be able to learn without government?
And the pedestrians and cyclists who dont have to fight drivers downtown, the children not getting asthma all benefit. Do people visit car dominated spaces by choice?
>all of them are capable of being overprovisioned.

Do you think the voters of any major city would agree that it is too easy to get from place to place?

>Mobility can be much more efficiently provisioned to the public with transit.

I think this is at least sometimes true, depending on factors like geography, density, labor costs, etc. But it's orthogonal to whether there is too much or too little mobility. You could take the efficiencies of public transport and deliver better overall mobility with the same budget. That's an easier sell for the public than "that extra hour with your kids after work is unsustainable and you don't really need it" or "having your own house in the suburbs is wasteful, share an apartment with 3 other families in the center instead."