[hackerlight]

It's a purity thing. The left and right have their own notions of purity that have nothing to do with a deep understanding of morality. If these notions of purity are violated, they feel disgust. For the right, everyone knows what those notions of purity are (racial purity, bodily purity). For the left, hiring low wage workers is one of the triggering impurities, even if doing so leads to demonstrably utilitarian outcomes in the form of reduced suffering. So it's just people trying to avoid disgust triggers. Nothing to do with morality.