I'm surprised how many people are against democracy in the workplace, and think, without the countervailing force of collective bargaining, they will continue to have the labour protections they have today.
I would argue that the presence of a union does NOT introduce "democracy". They introduce a situation where they hold a gun to management's head by going on strike. They lead to insane work rules that breed inefficiency and laziness. It becomes impossible for companies to get rid of incompetent workers.
Even if you accept the concept of unionization, if it were "democratic" then it should be as easy to kick a union OUT as it is to bring them in. It never is.