Skipness - I agree with offshoring leading to a hollowing out of the middle classes and all the social ills that it causes, but to keep the discussion roughly on topic, why will Norwegian using cheap Thai labour cause problems to *Norwegian* later ? If there's a really abysmal reaction by passengers, then Norwegian can think about improved training, but Ryanair seem to do OK with their cheap eastern / southern Europe cabin crew.
There's an endless pool of cheap labour who can speak basic English out there in the world - increased availability of cheap labour lowers Norwegians's costs and helps improve their profits. What happens to the overall attractiveness of being cabin crew as a career to the average UK school leaver is not really Norwegian's problem - or at least that's the way Norwegian senior management are likely to see it !