I ought to know better than to tangle that kind of bait in front of a world religions scholar! Borrowing forms, stories, language and the like, of course, is not in dispute. That happens. My point was that it would have a been a shame had they simply imitated (done nothing more, or become like) their own oppressors.
They, as you demonstrate, did not do so. Instead, the Hebrews did something creative with it. From my perspective, the Ninth Commandment is an example of that creativity: it provided protection for the accused, said protection including the weight of divine sanction. Viewed in this fashion, the Ninth Commandment becomes a piece of a larger way of life in which slaves, the poor, and the powerless potentially enjoy the same legal status and protections as the powerful. From there, it's not too far a conceptual leap to begin to say that God takes the part of the underdogs of society (again, some of the prophets come to mind). That was a revolutionary idea (and still is, more often than we care to admit).
I'm intrigued by your brief discussion of "this world" versus "after-life" centeredness. Christianity is not monolithic, never has been to be truthful. In any given era, large numbers of Christians function out of a concern for the after-life. Even in those cases, though, one finds a considerable emphasis on spiritual growth. When we unpack the written documents, we often find that "spiritual growth" implies learning to live in the present moment as if already in the presence of God (the classic definition of Heaven). Good works, prayer, embracing joy, putting work and play and family into proper relationship, and a host of "worldly matters" assume great importance. One does not so much die and hope to go to Heaven as one learns to follow the way of Christ and thus enter into "eternal life" in the present life.
That being said, Christianity often veers in the direction you indicated. A number of casuative factors come into play. A few examples include sermons consistently focused on the potential terrors of the afterlife, human despair in the face of war and plague and the like, and the effects of mass-conversions oriented revivalism. Sooner or later, though, the system somehow self-corrects. In the past half century or so, for example, an increased appreciation of the Hebrew prophets coupled with a renewed sense of the "this world_emphasis" of Jesus has helped. The "emerging church" movement, in some measure, represents a recovery of this aspect of Jesus' intentions. You'll find the same kind of thing happening in many mainline denominations.
Personally, I find both emphases helpful. My strongest inclination is to deal with this life, to affirm it as a gift from God, and to seek to use it well (in accordance with the way of God). I also draw a kind of strength from the hope of a life beyond this life (from my perspective, resurrection and a new creation). It's not so much a hope for continued existence as it is a hope that evil shall not have the final word, whether with regard to the individual or the creation itself. To put it another way, I see my redemption and any redemptive act I may do as a minor foreshadow of a greater, conclusive redemption wrought by God.
That's probably more response than anyone needs or wants. I'll be interested in your comments, and I'll also look forward to seeing what else you pull from the Ninth Commandment.