You're forgetting about payroll taxes. Saying 51% don't pay anything isn't true. Also the very wealthy have extra advantages to the political process where their voice is more heard than the little guy.
SEIU, ACORN, and teacher unions are three examples where the reverse is true.
In all these examples, angry mobs harass and intimidate to get what they want, in unsustainable deficit spending that will inevitably collapse the system, despite that their average salaries and benefits are higher than those in the private sector.
In Minnesota, New Jersey and elsewhere these union members rage and whine about cuts to make the system sustainable, despite that the cuts STILL leave them with greater pay and benefits than the private sector.