The rate of unionization in Europe is higher than it is here. They have higher inflation and double digit unemployment.
People forget that the trade unions in England during the seventies nearly destroyed that country.
The unions don't merely want to be one of the choices available in a free market. Nope, that's not good enough for them. They want to be the only choice in a rigged game where they not only end up with control of the worker and his money, but also the means of production itself. One way, is to support leftist politicians with their members dues money. Every year the unions give tens of millions of dollars to Democrats and almost zero to Republicans.