It means that subsides have nothing to do with supporting American agriculture & helping Americans eat a balanced diet cheaply & everything to do with lobbyists from certain industries snatching up a lion's share of the subsidies to no one's benefit but their own.
Hope you understand now.
But there's two problems. First, the data isn't all that correct if you believe the numbers coming from the Environmental Working Group, which seem to be in-line with those of the Congressional Budget Office (the latter of which I only have a chart, can't find the actual data on CBO web site).
The
EWG page says that dairy and livestock received roughly a combined $6.5 billion between 1995 and 2006. Corn and wheat, however, received over $78 billion during this same time frame. I think your pyramid chart, while pretty, is a bit suspect.
Second, even if livestock and dairy received the most in subsidies, so what? Go down to the local grocery store and tell me what the cheapest options for eating are... or better yet, read check out
this chart from the USDA and
this story from the National Cattlemen's Beef Association.
So the average price of a pound of regular ground beef was $1.45 in 1996. In 1999, it was more expensive to buy the cheapest cuts of beef on average than it was to buy pineapples, grapes, plumbs, nectarines, tangerines, peaches, tangelos, kiwis, pears, apples, mangoes, papayas, oranges, honeydew melons, cantaloupe, grapefruit, bananas, watermelon, squash, spinach, carrots, Brussels sprouts, tomatoes, lettuce, bell peppers, cauliflower, green beans, broccoli, eggplant, sweet corn, radishes, celery, cucumbers, sweet potatoes, onions, cabbage, and potatoes. And yet you say the government makes it cheaper for me to eat a Big Mac than it would to make a salad.