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Slavery has been around since the time of Jesus as well. Doesn't mean it worked to benefit humankind, or was morally correct. The idea that futures speculation smooths out markets is fine... until a crash or a depression brought about by that speculation. When nobody has a job or income, things are very smooth indeed. Ever been to a horse race track? Willing to base the world's economy on the model of off track betting?
If we put our existence in the hands of a system, then the system will control our lives. It is no different than placing your fate in the hands of a religious institution, or a authoritarian government. When a humane doesn't have input, the results are inhumane. Darwinian techno meme of "free" markets is devoid of morality and humanity. That was Jesus' point then, his point is valid now.