Who would you pay to pick your fruit, work in slaughter houses, clean hotels, or mow your lawn? When White Americans want those jobs then it might be the time to talk about who who is paying the tab.
This comment points out a need to consider painting this picture with less broad strokes so as to see whatever picture is actually there to be seen. At a minimum, "white Americans" is subdivided by 1) white Americans on welfare and 2) white Americans who, alternately, are genuinely desirous to labor for hire so as to support themselves; ... "work for their pay", also known more broadly as "livelihood", "having a job" ... "going to work" ... "what do you do for a living?". This subdivision does not manifest only upon white Americans, it applies equally to all average Americans, white, black, brown, red, green and other shade of note who want to be self reliant.
Since they are already enjoying a livelihood in large part provided off the backs of average working Americans, those who have learned to excel in livelihood #1 are obviously the best suited to work the kind of jobs you mention. Group # 2 cannot afford to work these kinds of jobs as their primary source of income. Once you get past the fact that these kind of people, for whatever reasons, do not want to structure their lives so as to live them off the labors of other people, but instead want to sink or swim on their own, they still have a monumental job ahead of them; the task of sinking of swimming on their own.... paying the bills of basic necessities of life. These kinds of jobs do not allow a single person, let alone a family, to pay the bills of putting food on the table, keeping roof over head and clothes on back. A typical family necessitates other, recurring bills like medical needs, education (higher and or lower, public or private, good, bad or indifferent). At the end of the working day, officially speaking, single or family, these kinds of jobs will not allow all the foregoing to be met while also meeting the mandates of income taxation. Remember those? On paper, theoretically, they are the engine driving the welfare system. The peculiar nature of this system is, among those required to pay into it are those who do not want to be among it's beneficiaries. The flip side is, those who have learned how to truly excel as a welfare beneficiary have less actual worth to tax so as to pay "their fair share" into this system in the first place. This is part of what makes them, as welfare recipients, ideally suited as the best candidates for working these kinds of jobs. Try not to forget that aside from the poster child of the typical recipient, there is another poster child who's picture seldom makes the front pages; corporate America. Corporate white/black/brown/etc America also has it's hand in the welfare cookie jar. They helped construct the jar!
For quite specific reasons, it is dicey to add immigrants into this discussion, such as immigrants migrating from south of the US border, to include Mexicans "illegals". Difficulties so noted, there does not seem to be any legitimate reason to assume that "illegals" are any different than average white / black/ brown/etc Americans in this context. Some of them yearn to be part of subdivision 1, some of them struggle to remain a part of #2.
The overall point is, in the context the comments were made, there is only one category of people who are truly best suited to and best able to afford picking fruit, working slaughter houses, cleaning hotels and mowing lawns as a source of income; welfare recipients, be they white, black, brown, illegal or other, who's idea of livelihood has increasingly come to be embodied by the picture of the welfare system that bilks the funding of its benefits off the backs of actual, average, laboring, working people.