That might be what their proponents intend them to be for, but the extent to which they actually achieve their goals -- especially goals at odds with the manife

That might be what their proponents intend them to be for, but the extent to which they actually achieve their goals -- especially goals at odds with the manifest intentions of the actual market participants, including workers themselves -- is another story entirely. If reality works one way, but aspirational idealists are trying to "ensure" that it works in some other way, then their attempts will falter. Many regulatory interventions are at best performative rituals that measure their success in terms of creating the appearance that something is being done, with the question of whether what is being done actually resolves the actual problem (if there is one) barely being considered. In the worst case, these performative interventions create harmful unintended consequences at the same time, leading to them being a net negative. It's worth noting, also, that nothing other than "actual humans" are involved in any aspect of this. There are no non-human "entities" in existence that have autonomous agency and participate in economic exchange. Every question here is about interactions among humans, and the organizational models that humans use to coordinate their activities are not separate "entities" with independent intentions.