The whole point of a union is to benefit its members contra the interests of their employer. The problem with public sector unions is that they benefit government employees contra the interests of the public.
And yet in some countries the union is able to work together with the employer so that everyone wins. (By wins I mean the employer makes money and stays in business and the employees earn a living wage.) This of course requires mature sensible people who see beyond the next financial quarter or the next paycheck.
For private sector unions this is true, because employers have a vested interest in the success (or at least survival) of their employer. In the public sector, prison guards don't have a vested interest in reducing the prison population (quite the opposite), police officers don't have a vested interest in keeping themselves accountable for use of force (quite the opposite), and so forth.
Yes because the vast majority of the public is not in a union. If they were then their union would be fighting for their interest and prevent the public sector unions capturing all the benefits at their expense.
Kuro5hin's Orion Blastar is completely convinced that I am anti-business, despite that I own two different corporations and get all my consulting gigs from businesses.
However it is hard for me to find work at all because I will not work for companies that I regard as unethical. Orion claims this implies that I regard ALL companies as unethical, but no, only certain specific ones.
Why is this ironic? I am a not anti-free markets. If a solution exists for a problem that can be solved by the market then I am of the opinion that the market should solve it.