There's also the argument that the pennies we're saving on each burger are being spent in our hospitals. A 2005 study out of Tufts University estimated that antibiotic-resistant infections add $50 billion to the annual cost of American health care. On the other side of the coin, a National Academy of Sciences study found that eliminating non-therapeutic antibiotics from animals would cost only about $5 to $10 per person per year. I'd pay that for a lower risk of super-staphylococcus.
That's very reasonable.