These two opinions were, first, that immigration constituted a net reinforcement of our population; secondly, that, in addition to this, or irrespective of this, immigration was necessary, in order to supply the laborers who should do certain kinds of work, imperatively demanded for the building up of our industrial and social structure, which natives of the soil were unwilling to undertake.Restriction of Immigration by Francis A. Walker, The Atlantic Monthly; June, 1896;

Yes, "which natives of the soil were unwilling to undertake" is the same thing that George Bush is saying when talks about work "Americans won't do." Walker demolishes this argument, but it won't stay demolished.