Clubs will continue to charge ludicrous ticket prices for as long as people are willing to pay them. Sadly, to many people the Champions League is seen as the holy grail of football. I've lost count of the number of "he must be world class, he's scored a hat trick in the Champions League," type comments on this board, even if the hat trick was against Rosenborg or Slavia Praha.
Clearly enough people are willing to pay £94 for a ticket for them to justify it.