How long do you have to feed a calf after being weened from the cow before it is old enough to breed to start the milk making process, not to mention having to feed the cow before she weens the calf, oh and lets not forget about feeding the bull to get the calves. Lets see 2 -3 gallons of milk per milking twice a day then seperate the fat, the cost of refrigeration. The list goes on and on. The cost of oil today is because it is not subsidised and the free open market dictates the price. I don't think we need to do that with our food.
In the long run that's true and the price has gone down over time. However, in the short run, oil, since so much is imported, is subject to manipulation of the foreign exchange rate of the dollar, which for the most part is controlled by the White House. The government is everywhere. See my tag line.