Empathy

....and if simple morality and decency are concepts too difficult to convey: Try naked self interest: A rising tide raises all boats.
I pay taxes, more than I can really afford. A large percentage of my taxes go to providing education for the local children. I have no children...and yet...I have no objection to paying taxes to educate other peoples offspring because I realize that for a modern society to function, the citizenry needs to be educated.
My taxes also go to roads. Roads that carry freight, and oil and the workers to process that freight and oil, so that the stock holders that own freight companies and oil companies can amass record profits and pay massive executive bonuses, while paying the lowest effective tax rates in the industrialized world......oh wait....apparently my empathy has limits....