Sorry, but you are off-track.
Wickard v Filburn was a case brought to the United States Supreme Court that drastically increased the amount of economic regulatory power the United States government employed.
Towards the conclusion of the Great Depression, President Franklin D. Roosevelt signed into law the Agricultural Adjustment Act of 1933 which purposely decreased production in the agricultural sector by paying subsidies to farmers that did NOT plant on parts of their land.
As well as the subsidies, the United States urged farmers to kill any excess livestock they may have.
No, I am not off track. The quote he listed, to which I referred, is from Justice Thomas, as I said. It was in dissent to Raich v Gonzales. Look it up.