Well, yes, that Americans "make too much" relative to cheap foreign labor is a very real issue, whether certain types of folk want to admit that or not. Unions tend to exacerbate labor expenses, which makes them a key component of the problem.
What about employers/owners/shareholders/management? Do they "make too much" too? Will they be replaced as the industries is relocated to cheaper/poorer countries? Of course they will, and it will serve them right!