Agreed, but let's not limit the elimination to just "farm" subsidies. We need to get government completely out of the "favoritism" game. No more subsidies to any business, period. If you can't pull your own weight, the market will either get you to change your behavior, or you'll be forced out, as it should be.
Compete in a marketplace that's free from interference, and if you can't, your corporation/farm/business/etc. dies.