I think once again you've totally missed the point.
It's not saying "they're foreign so it's OK and we don't care about their working conditions." It's the acknowledgment that British workers are not willing to work under such pay and conditions and that this leaves the choice of let it rot or bring in people who will accept them.
That conditions in their own country are such that they see this as improved wages/conditions over staying at home is a travesty.But it's not like the slave trade where they're just being taken from their own country by force and made to work here - it's a choice. We choose not to do it, they do.
Exactly. Apparently it's beyond his comprehension though and we're all appalling racists for encouraging FOM.