de blasio , clinton 's campaign manager during her 2000 senate run , said on sunday he will not give up endorsement until he sees a vision from her .
he also said that americans are demanding candidates to have a plan for addressing ` out of control ' income inequality in the country .
plan should include increases in wages and benefits and willingness to tax the wealthy .
de blasio said clinton is ` one of the most qualified people to ever run '