Irish TV Need Not Apply

One of the best shows on TV is Copper.  Set in the 1850's in the slums of NYC with all IRISH characters and realistically shows how bad Irish immigrants had it when they got off the boat.  It was one of BBC Americas highest rated shows and they cancelled it!!!  WHY??  Copper was one of two Irish shows on TV and now it's down to Ray Donovan on Showtime.  Which is excellent.  Why are there not more Irish TV shows?  Based on the millions of people who claim Irish roots and one show to watch??  When I win the lottery it will be Irish TV Need To Apply!!!