If "lowly vanners" did know more than the "dumb truck driver" types, then what are they doing in a "Van"??
Yes OVM, you are a "throw away" contract driver, plain and simple. It is much easier for a Carrier to replace a Cargo Van than it is for them to replace ST's and 18 wheelers. Less restrictions, less paperwork, lower costs to both them and the CV owners, and so on. CV's are a dime a dozen out there. If you don't want to accept their .72 cents a mile plus .12 cent surcharge rate, they could have you replaced within 3 days out of a pool of dozens of other "CV Owners" from all over the country that are willing to accept that rate.
This also relates to the "Courier-Delivery" type of services that are abundant here in heavily populated areas like DFW and such. Courier companies advertise looking for all types of vehicles. They are always looking for Economy Cars up to 28ft Box Trucks. They have a whole gammit of people applying for courier positions. Out of 50 applicants, 40 of 'em will be Economy Car drivers, thus leading to higher % percentage rates and better load offers to the ones that have the Cargo Vans, the little Box Trucks, and the big 28ft Box Trucks just so that they don't have to keep replacing them.
Same logic applies to trucking overall. There's more money to be made with larger load carrying vehicles, IE-Straight Trucks and TT's. So again, Cargo Vans in general are a dime a dozen. And if anyone thinks they "deserve" bigger truck rates, well....that's just ridiculous.