"Love God with your whole heart, mind, and soul" and "Love your neighbor as yourself" are how Jesus summarized the Commandments. Economic activity and relationships are no more exempt from that than any other aspect of human existence, pace Ayn Rand.
(I would hope that no thinking Christian looks to Rand for any sort of guidance. Rand may be the diametrical opposite of Marx, but the opposite of an error is usually another error.)
“I think you’re conflating social justice with socialism.”
Please have another look at my longer note. Social justice *is* socialism. It cannot be otherwise.