Bernie thinks the poor are poor because somebody decided to make them poor. Thus, everything the poor don’t do, or have, or know, is the result of “injustice.”
This is the way almost all clergy (at least the loud ones) think. E.g., the Pope.
The truth is that people are, in most cases, and in most countries, poor because they are unintelligent. The things they don’t know, don’t have, and don’t do are the result of lack of intelligence.
This truth does not comport with the career goals of people like Bernie, or Bergoglio.
There was a study that concluded that the chronically poor were that way because they consistently made bad decisions. Voting for Bernie or Hillary would be just one more of those decisions.