In the 70s British unions were a law unto themselves and they regularly brought the country to a standstill. Thatcher then came to power and she broke the power of the unions. Bibi needs to break the all powerful Histadrut because they will make companies think twice about investing in Israel, instead of just laying off people companies like Teva which employs thousands will instead move abroad where they don't have to worry about unions. Its also wrong that they can bring the whole country to a standstill just because one group want something. Powerful unions hurt the ordinary people they do not look after their interests which is what a union is supposed to be there for.
from the article: Amid layoffs, Teva may shift Israeli plants to Far East