The pleasure of pigs is equal to the pleasure to reading inspiring literature. Mill thought this was too simplistic. This leads one to wonder if such things are not valuable even if they do not lead directly to happiness. Act not only to maximize pleasure, but to minimize pain. If both lead to pain, then we must choose the one that produces the fewest units of pain.
Actions affect different people differently.
Utilitarianism does not involve each individuals pain or pleasure, but the greatest number, hence majority rules. But, what if the pain for some individual is intense. Because only consequences matter, almost any action could be morally right in a given circumstance. Must consider the indirect ramifications of an action because must consider the long-term consequences of the action. So, cannot solve the short-term dilemma without considering what the larger implications of the act will be.