Perhaps it's beneath the dignity of Members of Congress to shop at a grocery store, but if they did they'd know that food prices are rising faster than at anytime in 17 years. Milk now costs $3 a gallon in many states. Eggs, oranges, peas, tomatoes and rice are selling at or near all-time highs. The biggest winners have been corn producers, as corn prices have doubled in two years -- thanks in part to new mandates for ethanol. All of this is translating into the best gains in farm wealth in decades. Total farm income is expected to leap...