[guard-of-terra]

1) Bad social economic factors arise from bringing in a lot of immigrants and paying them "below water level".

Also leaving them to their own devices.

I don't know if that is the case with Switzerland but there is just so much immigrants you can integrate and so much discount work you can get from them before you begin to rip the social fabric of the country; And this is happening in some countries, they push too hard.

So, limiting immigration to some realistic amount seems to be the right thing. Of course this applies less to educated professionals from similar cultures and more to cheap labor.