Protection racketeers might also find they do not have a profitable security/insurance business when no longer permitted to make threats of violence against their customers. But I can see that she is making a political point that will go down well in some quarters despite the (presumable) legal hopelessness of such a claim.

But it is generally the case that all kinds of farmers have had to be very canny to remain profitable in high labour cost countries, and there still seem to be plenty of operating dutch farmers who clearly have the skills, though doubtless some have fallen by the wayside. Personally I'm willing to pay a substantial premium for north European asparagus because it is tastier than the warm country stuff that is now so much for sale, and I expect a clever asparagus farmer can exploit that. But if she was trying to compete against warm country low cost suppliers, she would indeed fail.