Wow, tickets to Arena Stage shows are so expensive...

Wow, tickets to Arena Stage shows are so expensive! Over $100 for most performances?! Theater in the Washington, DC, area does NOT have to be so expensive! Several theaters in DC have very affordable tickets. For example, Folger Shakespeare Theater has $25-$50 tickets. Synetic Theater (in Arlington, VA) has very elaborate and enjoyable shows for no more than $50 (and $10 preview nights). So why is Arena Stage so expensive? My family and I would like to see "Oliver!" but I only see tickets available for $119! Forget it!