Less than 50% are employed 5 years after arrival, in a country with 5.7% unemployment.
I imagine adults who don't speak the language, require financial assistance, etc, will be a net drain from a tax perspective on a society, esp. when you factor in the high CoL. Its hard enough for the average naturalized citizen to be a net positive from a tax perspective, let alone someone from an entirely different world. An inconvenient/unpopular, but obvious truth.