A political Party does not define democracy. Majority of PPP members want him to be chairman, so he became a chairman. This decision is the internal matter of the political party, aam awam cannot interfere in their decision. Its not the business of the awam to elect leader of a party.
Business of the awam is to reject or accept that leader through voting process.
Its not about revolution, its about properly minding your business and responsiblities. Republicans fielded that bimbo Sarah palin as VP of USA, and people rejected her by voting against her.
Who is stoping you to vote against this nawabzada?? Or may be, standing in line to cast your vote does not suit your status.