Or that fact that some jobs pay more than others.
A stockbroker, for examply, doesn't work harder than a nurse, nor do they contribute more to society.
The daughter had higher grades because she'd worled harder.
Her father's assertion that someone wealthy paying more tax is on a par with her sharing her grades only works if the amount of money one has is proportional to how hard they've worked.
It isn't, not even close.
If the majprity of wealth was with those who had worked the hardest then it would be a fair point.
However, it isn't, and anyone who thinks it is is delided.