It's known that these areas had four immigration phases, from 1820 to 1960. The monarchy (then the government) began to stimulate the arrival of Europeans because of the vast land and good climate. The monarchy even used agressive propaganda and megalomanic promises. Our recent elected president came from one of those european immigration waves, from Italian Veneto region in 1888.
There's a huge italian and german presence in this southern region (as well as in Argentina and neighbors), and also great natural resources that allowed agriculture and family farming to those european experienced farmers. This southern region today produces most of Brazil's grains, oilseeds (and exports).
So in a way, knowledge, higher incomes and education levels were imported. Brazil is full of curious phenomena, and it deserves more sociological study, being a young country.