They didn’t stop planting wheat to get corn subsides. They stopped because corn is a much higher yield crop that is more tolerant than wheat.
Trust me. My Grandpa hated government money, and had stopped growing wheat long before I was born. The reason? He got tired of losing one in five crops.
Stem rust (Ug99) is a major factor in the ME wheat production difficulties.
The article suggested that farmers were enticed by subsidies.
That said, as a gardener who has been thwarted by a crop or two in my time, I’m sure not going to argue with anyone’s Grandpa about choosing reliable crops.
:)