Yeah, oil barons could voluntarily agree on selling for 500$/barrel as well and you could voluntarily not buy from them. Same goes for cable companies or electr

Yeah, oil barons could voluntarily agree on selling for 500$/barrel as well and you could voluntarily not buy from them. Same goes for cable companies or electricity vendors or any other monopoly. That would kinda suck if people controlling most of the resources (or all of them in given area) would agree to not compete. That's why it's immoral and illegal.