Which is worse, being a slave to a large corporation or to a union that confiscates your dues to pay $60,000,000 to a candidate you don't support? A labor union did just that for Obama?
If you are going to let one group pay money it is only fair to let anyone do it!
Just as the Average Joe cannot compete with corporations, neither can he compete with unions! And he has no choice in how his money is spent in either case!