Paying people reasonable wages and allowing them to work in safe conditions wont result in 800% markup. At most it will add a couple cents a pound to each chicken. In the modern free trade environment that would be unacceptable and drive American producers out of business but with 10% tariff an all countries that pay their employees less than we do US industry would be able to compete just fine.
That implies that the small producers are taking a 790% profit and I don't think that's an easy argument to make. There are economies of scale, obviosly, but ethical, sustainable poultry is a long road from 79 cents a pound.
Small producers have no economy of scale. We own 3 chickens and just the hatchlings cost me more than a 5lb chicken from the store. Add in 6 months of food and I'm probably at 25-30 bucks a chicken before I get a single egg. Since I can't get a chicken to weight (food wise) for the price i pay for a cleaned full grown chicken obviously there is a different price scale at the mass production end.
My ethics don't really extend to the chicken itself it's got the intellectual capacity of an ant. Ifit was cheaper to grow them in test tubes I wouldn't even be opposed to that. But I do think that that the people working these facilities should be treated better and I have empathy for them.