There was a documentary aired here in Australia which follows several out-of-work UK natives as they're given the jobs that (legal) immigrants do. These are job

There was a documentary aired here in Australia which follows several out-of-work UK natives as they're given the jobs that (legal) immigrants do. These are jobs like picking asparagus, working at a packing plant, and carpentry. Out of the 8 or so natives only a handful actually show up for work, and of those only one or two actually do the work to a reasonable standard and would be considered employable. I've also seen reports in the news where Australia needs more seasonal agricultural workers, as Australians don't necessarily want to do the work. Most recently there's been a trial program to get pacific islanders in on temporary visas to work these farms. And traditionally it's been backpackers that have worked these fruit-picking and misc jobs. So it seems to me that a lot of the population of the "developed" world, especially the native people, don't want to be doing those menial, labour intensive, and repetative jobs themselves. Also I don't believe that the immigrants that do these jobs now want their kids to be doing them. Therefore I would say that we should work harder to try and automate these kinds of menial mind-numbing jobs as best as we can.