The fact is that something cheaper actually would be a better food, Eukanuba is greatly over priced for the quality, I feed Orijen kibble now and it is cheaper than Euk. And far superior.
But in the end, believe what you want about loading your dog with carbs, I personally see no good in corn no matter how companies "sugar coat" the ingredient.
Have you looked into the negative sides to those ingredients as well???? Or are you just basing what you choose to believe on what the company that needlessly uses it says?
Some breeders feed Ol'Roy too, that doesnt make it a good quality food.