Who is more likely to be sympathetic with the idea of reducing the disparities of income in society?

Answer: Utilitarians

Explanation:

Utilitarians are the people who believe in increment in happiness and improving welfare of the person who is affect or suffering. Any act that causes suffering and sadness is indicated as bad act by utilitarians. They also believe in making choices that makes people happy and provides benefits as the good deed or action.

According to the question, utilitarians would be most likely agreeable on the idea for removal of imbalance in society income as it would be beneficial act for all the people of society and induce happiness.