Two words: STUDENT LOANS
There's the answer, folks.
Many kids are leaving college these days with the equivalent of a home mortgage payment, and very little job prospects due to the "new normal" unemployment rate. How can they then afford to buy a home? How can they afford a new car with no job? I'm not saying that they have no responsibilty for their situation, just that we can't copy the European model and not expect the same results.
Young adult Europeans live with their parents, because of economic conditions that Obama is replicating for us here. Multiple generations live in the same home.
Obama wants a European model for the USA, and he's getting it. If we continue down this path, our country we'll graduate from being like Italy to being like Greece, and the American dream will finally be dead for future generations.