Just saying that farmers, ranchers and dairy producers have no power to price their goods. They have to take whatever the market is.
Minor quibble: The producers are half of the market - the supply half. A single dairy producer can't change the price of milk much (milk is a bad example, really, because the US gov't sets a price floor for milk, but let's run with what we brung). But if a consortium of dairy producers got together and agreed to limit their supply in order to raise the price (see: OPEC), then it would have a significant effect.
As for the original point,
taxes are a cost of doing business. Businesses are profitable (and in existence) only when the total revenue exceeds the total costs. Corporate taxes create a disincentive to start a business.
Really simplistic example: I have a business plan that costs $100,000 to execute. I have a 50% chance of success, in which case I will make a 20% profit annually; I also have a 50% chance of failure, in which case I will lose all of my investment. On the surface, this seems like a worthwhile endeavor: 20% forever vs. zilch; a lot of folks would take that bet. Now let's reduce that profit by 35%, and see how many folks would take 13% forever vs. zilch. Hm... Not so many.
Now, how many jobs are lost due to corporate income taxes? How many inventions have we lost because it's just not worth it to put decades of your life into something, only to have the government take a third of it?
I view taxes as friction on the economy. Some is necessary, but the current tax structure is a disaster. Don't even get me started on the whole "progressive is better" thing...