On Amtrak's LD trains, with the exception of the Auto Train (obviously) and maybe the CL, the majority of coach passengers do not travel from endpoint to endpoint, but travel between the various other stations. Perhaps the same could be true for Greyhound.
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I'm sure the same is true for Greyhound, because whenever I've priced a long distance trip, you have to changes buses a lot (and at inconvenient times, too.)
If they had a lot of passsenger demand for longer trips, they'd have through buses.
Greyhound isn't in the passenger transportation business. Expecting them to operate on that basis is an exercise in faulty logic. Most of their income comes from fast-delivery, LTTL cargo.
Now, to the discussion at hand. Like HenryJ I have quite a bit of accounting training. In fact, I am 3 credits and a CPA exam away from being able to call myself a CPA. So I have some idea from where I speak.
In every business, one has different kinds of costs. I know most of you know this, but bear with me. Imagine you are Sony. On one assembly line in a factory, you build headphones. They cost a buck or two a piece to produce, lets say. The other assembly line produces plasma televisions, 65", the cost $900 or so each to make. Now lets simplify this and assume that Sony has two plants, each of which produce two items, and one group of executives. There are, of course, the direct costs of assembling each unit. Those are easy to track.
BUT there are costs to operating the factory- its A/C units, its hallway lights, its bathrooms, its lunch rooms, its managerial offices, its shipping department, and so on- which are shared between the two assembly lines. Beyond that, there are costs associated with senior management, internal infrastructure- for instance, Sony probably owns (or leases, whatever) its fleet of trucks- which it also probably maintains in its own garages using its own mechanics- and so on.
These costs exist. You can't ignore them. And thus you need to allocate these costs to each individual product produced by those factories in order to be able to figure out in realistic terms how much the units cost you- and allow you to price them accordingly.
Now lets say that in a year, this factory turns out 20,000 TV sets and 2,000,000 headsets. Let us assume the units cost $900 and $2.50 in direct costs to make. Lets assume the factory has $4,000,000 in overhead cost, and the company has $8,000,000 in overhead costs. Lets assume the other factory also, by chance, produces 2,020,000 units as well.
There is the divide each section equally method, then divide by units produces. So you allocate to this factory $4,000,000 in management overhead costs. You have $8,000,000 for the factory, and you allocate half to each product production team, so that you add $4,000,000 in allocated costs to the TVs, $4,000,000 to the headphones. Now divide by the number of units produced. The "allocated overhead costs" add $2 to the cost of the headsets, and $200 to the cost of the TV sets, using this metric. That nearly doubles the cost of producing the headsets, and adds 22% to the cost of the TVs.
But let us use a different metric- also accounting wise proper. I have 8,000,000 in management expenses, and we produce 4,040,000 units companywide, so management expense per unit is $1.98. I have 4,000,000 in factory expenses and 2,020,000 in production, or also $1.98. So my headsets now cost $6.46 to produce and the TVs cost, uh, $904.46.
By changing my allocations, I have changed the cost of the headsets massively upward- $4.50 to $6.46. And amazingly dropped my TV costs- $1100 to $904.46. But here's the thing- both methods are absolutely legitimate ways to divide those expenses. As Sony, I would indubitably chose the first option, since it most realistically allocates the cost- and figuring out sensible ways to operate my business is in my best interests. But Amtrak... they need to justify to a bunch of morons- Congress- that they deserve to exist. Their accounting is set up to put costs in certain places.
Do the LD trains make sense financially? I have no idea. I assume so- I suspect that outside of the SL and Cardinal, which provide very limited economic benefit, Amtrak more than covers its costs in increased economic benefits- and its resultant revenue to the IRS. But the fact of the matter is, looking at what I've seen, Henry J is actually right- the LD trains do have "bloated overhead"- far too much of the overhead is attributed to them relative to what they actually take.
For example- you can divide overhead by many different metrics- by train, by Passenger mile, by train mile, by passenger count- and more. Which metric you use to allocate costs greatly influences what money goes where.