you guys give too much emphasis on money. money is not the driving force behind economics. it is a representation of what really is - valued resources. econnomics is making desicions with limited resources, so if there wasn't money, the economy would still work in a very similar way. be it with gold, diamonds, land, water etc.... whatever is limited. the more limited the more valuable.
now im not defending lex's scheme, but i think it works from a thematic standpoint. lex steals supermans birthright, recreates the home superman lost, except that superman can't survive within this new krypton. so superman is again exiled from his home. thats pretty kosher.