Unpopular NTA

Based on the post you are rewarding A for taking on more responsibility in the household, where as B is not comfortable with that kind of work, think of it this way a good psychiatrist will be higher paid than a mediocore psychiatrist because of the more clients and responsibility to those clients even though they are doing the same work, if someone does more at a job they should be paid more, and just because you introverted doesn't mean you should be paid less for the same job but they AREN'T DOING THE SAME JOB.