ParticleGrl said:
This statement is actually really hard to quantify, and (to me at least) doesn't seem likely to be true- sure, the trucker spends a lot of time driving, but presumably, your higher income means you purchase more goods that have to be shipped.
You're mixing up earning and spending.
Also, I'm not sure to task with "use-of-the-road" for a trucker driver- it seems like the owner of the trucking company derives more benefit from the roads than his employees, despite never driving the routes.
Many truck drivers are sole proprietors/contractors, but regardless, Ryan's marginal utility concept applies here too: even if the company takes more $ profit from the shipment than the driver (I doubt it, but we'll go with it*), the driver gets a much bigger benefit for what they get paid.
*You're assuming the company's
profit is a larger number than the driver's pay, which is almost certainly wrong.
Since consumption of goods scales with income, and more exotic goods will often be shipped farther, I might suggest that roads enable more consumption for the higher end of the income distribution than the lower end, thus creating a fairly strong correlation between income and road-use.
Again, looking at the consumption is backwards. If I buy something off the internet and get it shipped via UPS, I'm the one
paying the shipping cost, not getting paid by the shipping cost.
Pulling guestimates out of the air: Perhaps 1% of my income gets spent on shipping, but for someone who works at UPS, 100% of their income is earned from shipping. Other side of the coin: 1% of their income is spent on shipping while only 5% of my income is earned from "shipping" (myself to meetings).
I wanted to look at earnings only, but even if you include the spending, the earnings are so much larger of an issue that the spending really is irrelevant.
You also appear to be trying to have it both ways here, considering both sides of the coin (earning and spending) to benefit the richer, then flip-flopping them it when the direction is reversed. (If I earn money from shipping, I get the benefit, but if I spend money on shipping the benefit is still attributed to me).
[edit] And still I think this is all irrelevant anyway. We don't have to compare rich to not so rich, we can compare rich to rich and not so rich to not so rich. We'll find examples abound that show no correlation. I gave an example of two identical service companies that get vastly different benefits from shipping. On the other end, if we take a truck driver and trash collector at low-middle income and compare them to, say, janitors and food service workers who spend none of their time on the roads, we see vast differences there as well.