You are talking about subsidies for every type and kind of business in the country. Only farmers are singled out for attack because they are very few in number, mostly conservative and are non-union. There isn’t a business with 50 employees that hasn’t received similar subsidies. I live outside a small city. Just two years ago IBM put in some data center here and received about 10 million in tax-breaks and subsidies.
They are singled out because they abuse the system more than anyone else (you just said they are the nation's #1 industry). They also whine and moan constantly about not having enough illegal aliens to do their work.