Historically many fortunes were built because of special privilege from the King. Ignoring for a moment the anti-competitive claims against Microsoft, consider

Historically many fortunes were built because of special privilege from the King. Ignoring for a moment the anti-competitive claims against Microsoft, consider that that fortune already hinges on the special privilege of intellectual property law, which is backed in full force by the US justice system. Not all countries have this protection. Microsoft does not do anywhere near as well in countries without it. Does this protection ultimately help US citizens.....that point is up for debate, but it exists, and businesses exist to capitalize on it. Is it something that should be expected? For now, yes, but two hundred years from now, my guess is that intellectual property rights will have eroded, and we will view Gates's fortune as a fortune built using special privilege, just like oil fortunes were built before regulations against monopolies, and just like many shipping fortunes were built before that with special privilege from princes. Special fortunes typically need something special in the first place. Carlos Slim is not that much different from Bill Gates. Bill Gates spent a little bit of time as a heroic startup guy, but he spent the majority of his career doing much the same stuff that Carlos Slim does. If copyright law changed, as many MP3 sharers wish it would, his fortune would deflate as much as Slim's.