If anything, the WTS will "pass on" the costs associated with printing, shipping, etc. to the r&f. But this can only be done indirectly - a simple "we need more money" article in a KM would do it. I'd also bet my left nut that they wouldn't say a word about the poor publishers having to pay for higher gas prices out of their own pockets either. It would be all about them and being able to sustain the printing work.
I honestly do not see the WTS telling the pubs they can back off a little in field service due to gas costs. They *might* tell the pubs to help contribute to the driver's gas fund if they take someone else's vehicle other than their own. Many do this already by dropping a dollar or two in a cupholder. But let's face it, a dollar or two is nothing if you're the one with a large SUV in the hall that everyone expects to take out in service all the time. And if it's very hot or extremely cold out? Guess what? The car is going to be idling while bro-1hr-RV does his thing. I wonder how many pubs these days deep down hate taking their own car out? If I were still in or if my wife was still here, I'd go sell her SUV and buy a two-door coupe instead(or hell, even a truck!).
I'd also assume that many are starting to spend more on gas out in service than they contribute at the hall on a monthly basis. Some pubs might feel that by contributing in that way would get them off the hook for the other. That would spell more bad news for the WTS too if it were true.
If there is one bright ray of sunshine regarding this recession(yes, we are in one) and high gas prices, it is that the WTS is probably seeing a huge drop in cash flow right about now. With the Pew Forum's recent survey on jw's, all of those low income earners need to save pennies wherever they can. I know if I were in that position, donations at the hall would be one of the first places I would cut back at.
I bet they didn't even see this one coming.