Many, although not all, public sector unions became organized groups of extortion that use Liberal/Democrat lawmakers under unions' influence and protection in order to deprive, via progressing taxation, hard-working Americans of the fruits of their work for the benefit of the unions' members.
The Liberal/Democrat lawmakers have no interest in resisting unions' demands and just keep imposing more an more taxes on the public that apparently has no collective right to resist such a rip-off, or if the resistance against the tax hikes is stronger than the urge to tax, the lawmakers keep borrowing money in order to feed their unsustainable generosity for the public sector employees. And the public sector is the only sector of American economy that has been growing (or even metastasizing, like in the case of Government Motors) during the severe recession-depression of these days.