This week Andy Farrell explained the IRFU’s philosophy on handing out central contracts.  “Just because somebody pops up and plays four or five games that are really good, as far as international rugby is concerned it’s about consistency at this level to prove your worth. I suppose that’s how we’ve always worked and how we’ll continue to,” Farrell said.   He’s talking about contracts but it could be applied to the way Irish rugby conducts itself on and off the field of play, which is to take the sensible option, but to not look into the opportunity cost of taking…