Why would the dwarves feed the camp followers? How could they afford to feed the camp followers, when they have to maintain a supply train stretched over hundreds of miles of incredibly hostile territory?
More than that, why the notoriously greedy dwarves feed their own rivals when they can corner the market in loot and ensure they control it's distribution?
Mu.
Better question: How are they going to
stop the camp followers? Are they going to look at this growing train of cooks, stableboys, farriers, prostitutes, brewers, hunters, cooks, apothecaries, nurses, seamstresses, launderers, dozens of brands of smith, tanners, cobblers, merchants, peddlars, entertainers, bakers, squires, bards, grooms, ostlers, waggoneers, drovers, construction workers and more, and... what, tell them to go away?
Many of these people will be the wives and children of soldiers in the expedition. Are the dwarfs going to put them to the axe? Set guards over the army camps to ensure none of the mercenaries avail themselves of the waiting services? Don't be absurd. This is just how an army works; on any kind of long expedition, camp followers are simply an expected part of logistics. They provide necessary services (many, many necessary services) that allows soldiers to act
as soldiers instead of general labour.