Any one of Chris Edwards’s ten would be sufficiently persuasive. Here’s one example, with all worth reviewing:
3.) Farm subsidies are reverse Robin Hood. Farm subsidies transfer the earnings of average taxpaying families to well-off farm businesses. In 2011, the average income of farm households was $87,289, or 25 percent more than the $69,677 average of all U.S. households. Farm subsidies even go to millionaire farmland owners such as Mark Rockefeller and Ted Turner.
Via 10 Reasons the Farm Bill Makes No Sense | Cato Institute.