There is more here than meets the eye. What this study suggests is that we use our reward circuitry for moral decisions. Our reward circuitry is a big part of our moral compass. The abstract is below the article. It mentions 3 parts of the brain used in moral decsions - all parts of the reward circuitry. (the ventral striatum is the nucleus accumben - which is considered THE reward center.
So - what affects our reward circuitry then affects our moral compass - because they are inseparable
MAJOR MORAL DECISIONS USE GENERAL PURPOSE BRAIN CIRCUITS TO MANAGE UNCERTAINTY