He is looking for the "best quality of life". I am saying that Germany is not the place he'll find it. I am constantly comparing Germany (which is the country of my birth and citizenship) with other countries , like the U.S. (residence), Canada (business travel) and Italy (favorite regular vacation spot), for example, and I can definitely say, considering income, taxes, benefits, cost of living, real estate, Germany is NOT the place I would want to live right now.
Taking a temporary assignment and experiencing a different culture and country is a different issue and I would recommend to anybody who has the chance to do it.
Let me ask a question. Do you work for the US subsidiary or the German corporation?