"The point about Barcelona is the club cannot be hijacked by rich Americans trying to profit from the club and helping to run it into huge debt. Clubs owned by the fans, run by a president have to answer to the board and therefore debt is kept more in check and you don't get the same debt levels. Real are obviously taking another punt on Perez and believe that the money he has spent will be recuperated through commercial rights etc..."
We've seen too many clubs run into the ground by greedy chairmen who care nothing for the club and the fans. But it may be that that lets in some smaller teams, but that doesn't justify it.