In case other entries in this forum have yet to convince you, perhaps Mike Murphy?s new column will do the trick:

The cost of state employees’ benefits has skyrocketed in tandem with the rising power of public employees’ unions. It has become a perverse and semicorrupt arrangement: the unions raise millions from dues, which are then used to elect labor-friendly politicians who cave at the contract-negotiating table, especially on long-term employment deals, whose cost really begins to crush the state or city budget in the years after the agreeable politician has left office. This is where public-sector unions lack the moral authority of their private-sector brethren. When the United Steelworkers negotiate with a steel company, they don’t also control the company’s board of directors.

Few Americans understand how the public-employee-union money machine works. Many unionized state and local public workers have their dues automatically deducted from their paychecks. On average, a teacher in Wisconsin pays more than $1,000 per year to the union (from an average salary of $51,264). A decent chunk of this money is used to fund political activities. That doesn’t mean just making contributions. It also means running lavish independent ad campaigns in support of their chosen candidates and against their opponents. Even Democratic candidates who oppose union priorities can face massively funded negative campaigns targeting them in primaries. Engaging in such well-funded political activity is the unions’ right, of course, but their immense financial power means they are bringing a machine gun to a fistfight.