Why are there so many visible mentally ill people in America and I never see the

Why are there so many visible mentally ill people in America and I never see them here? Or rather they are quiet and civilised when you find them. Is it the beggar culture each country encourages?

I mean you can get the shit beat out of you here for rudeness.

Is it that they tend to be near the churches? Or that the die off more quickly from self medication? Or the poverty and lack of institutions keeps them in villages?