The main reason American workers are not exploited is that they can easily get other jobs and would be difficult to replace (but when that’s not the case, they are).

Same here in America. It's just that in America we resent that people with rights cost more, so every mistake any union has ever made must be proof that they want to resurrect Stalin and make him President for Life.

It’s an American thing: there’s been money pouring into promotion of libertarianism and anti-union ideas like “right to work” laws ever since the Great Depression-era reforms lead to better compensation and rights for workers. A lot of influential writers, preachers, etc. got substantial funding and promotion for generations so now you’ll find many people who are conversant with these ideas but never really understood their origin as a coordinated campaign rather than an organic movement.