That is a very good point. Left wing wants to apply a moral quality to material in general. Look at the basis of gun control, which is that an inanimate object can have a moral quality. The left in fact defines morality in terms of the material.
Dialectical Materialism introduced by Marx tried to redefine morality in terms of material instead of spiritual context.
It’s all in Adam Smith’s “The Theory of Moral Sentiments”.