Answer:
It creates an unrealistic perspective for society.
Step-by-step explanation:
Imagine the scenario: there are eight people right now who would benefit from having your organs. When looking at the principles of utilitarianism, the balance of happiness over harm supports the idea of putting you to death to improve the satisfaction of everyone else. Why?
Because you are not in that majority.
If there are eight other people and you to make nine, the chances are that everyone else will vote to save themselves as a group at the expense of your life. That is why the ends can never justify the means. It makes it too easy for the majority of people in a society to create harm using the balancing principle. The happiness of the minority must also come into consideration.