it’s not a communist sentiment at all. labor theory of value is predicated on socially necessary labor not just doing any old thing.
what youre doing with those statements though is pretty disingenuous. the idea of earning comes from labor (it’s literally the germanic to english word for a laborer and their pay) and has always meant that the subject of the verb deserves the object.
you could argue that the raiding parties believed they had earned their spoils, but in a human culture that generally doesn’t hold that belief, saying it without that qualifier implies assent to the ancient raiding parties belief.