SPECIFICALLY SO THAT THEY CAN BE SELFISH
and buy all the lattes, new cars, McMansions, designer clothes, etc, that their income affords.
Buying all the luxuries that you can afford isn't selfish. Selfishness is pushing higher tax rates so you can distribute the income to those that "deserve" it.
In my worldview, it is.
Such as, for example, would it be more selfish to get breast enhancement surgery, or donate the money to help post-mastectomy patients?
But I agree about the leftist view of selfishness - THEY are the greedy ones, seeking to control wealth that they did nothing to earn themselves.