Many "ancient alien theorists" think that some guardian UFO aided Moses during his 40 years of wandering through the desert in an aimless fashion. "A new era now lay ahead for the Israelites and the guardian UFO vanishes from the pages of the Old Testament - except for the one incident concerning the prophet Elijah."
Well, it is obvious that the beginning of the book of Ezekiel could be talking about UFOs & aliens, but what does this have to do with gold collecting slaves? I don't know, but if I was an advanced race of beings (or a God of some sort), I'd be making those little bastards work for me, plus, gold is very useful for a lot of things - including electronic devices. That's right, Moses, listen to me dear mortal man, or I shall zap you into oblivion with my fancy, photon torpedo weapon... LOL!