that's because unlike in europe unions in the US did not manage to get the same level of worker protection changed into law. US unions need to act like a mob be

that's because unlike in europe unions in the US did not manage to get the same level of worker protection changed into law. US unions need to act like a mob because corporations are to powerful. compare that to eg. germany where there are more laws to protect employees so that pretty much the only job unions have left to do is to negotiate salaries and benefits.