Bernie is a socialist, which means he would use the coercive power of the state to take a larger portion of my modest income to give it to people who don't work and if I object, he'll then use the abusive power of the state to take away everything I've managed to hang on to despite paying too much of my income in taxes.

 I wouldn't vote for Bernie Sanders for any reason because socialism is an unfair system that rewards laziness and punishes self-sufficiency and if socialists can't get you to go along semi-voluntarily, they will force you to "contribute" at the point of a gun.